[Header] Format=SMU ver=3 appl=GUMWB32 MR=0 SUR=0 SUP=0 UIP=1 UCR=0 status=2 FUEB=0 [Title] Title='Determination of the amount fo lead in water using double isotope dilution and inductively coupled plasma mass spectrometry' Ref='' Date='08/29/2007' Version='' Author='' Description=17 Description[0]='This is the example A7 of the EURACHEM /' Description[1]='CITAC Guide "Quantifying Uncertainty in Analytical Measurement", Second' Description[2]='Edition.' Description[3]='' Description[4]='The amount content of lead in water is measured using Isotope Dilution Mass' Description[5]='Spectrometry (IDMS) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS)' Description[6]='' Description[7]='In this case a' Description[8]='''double'' isotope dilution is applied. It uses a' Description[9]='well characterised (ideally certified) material of natural isotopic composition' Description[10]='as a' Description[11]='primary assay standard. Two blends are then prepared: blend b, which is a' Description[12]='blend between known masses of the sample and the enriched spike, and blend b'',' Description[13]='which is the blend between the enriched spike and the primary assay standard.' Description[14]='The isotope ratios of the primary assay standard, the spike, the sample and the' Description[15]='two blends are measured using ICP-MS. Together with the weighing data of the' Description[16]='blends, the amount content of lead in the sample can be calculated.' PictureCount=1 DCount=1 [Model] Model=41 Model[0]='{equation for the double isotope dilution}' Model[1]='' Model[2]='c_x = (c_z * m_y1 / m_x *m_z / m_y2 * (K_y1 * R_y1 - K_b1 * R_b1) / (K_b1 * R_b1 - K_x1 * R_x1) * (K_b2 * R_b2 - K_z1 * R_z1) / (K_y1 * R_y1 - K_b2 * R_b2) / (\Sigma\K_zi_R_zi) * (\Sigma\K_xi_R_xi)) - c_blank;' Model[3]='' Model[4]='\Sigma\K_xi_R_xi = K_x1 * R_x1 + K_x2 * R_x2 + K_x3 * R_x3 + K_x4 * R_x4;' Model[5]='' Model[6]='\Sigma\K_zi_R_zi = K_z1 * R_z1 + K_z2 * R_z2 + K_z3 * R_z3 + K_z4 * R_z4;' Model[7]='' Model[8]='{calculation of the molar mass of the lead of the primary assay standard 1}' Model[9]='' Model[10]='M_Pb\sp\Assay1 = (K_z1 * R_z1 * M_z1 + K_z2 * R_z2 * M_z2 + K_z3 * R_z3 * M_z3 + K_z4 * R_z4 * M_z4) / (\Sigma\K_zi_R_zi);' Model[11]='' Model[12]='{concentration of the primary assay standard z which is used for the double IDMS}' Model[13]='' Model[14]='c_z =m_2 / d_2 * m_1 * w / d_1 / M_Pb\sp\Assay1 * k_mol;' Model[15]='' Model[16]='{calculation of the K-factors for the various isotope ratios measured}' Model[17]='' Model[18]='K_b1 = K_0\us\b1 + K_bias\us\b1;' Model[19]='' Model[20]='K_b2 = K_0\us\b2 + K_bias\us\b2;' Model[21]='' Model[22]='K_x1 = K_0\us\x1 + K_bias\us\x1;' Model[23]='' Model[24]='K_x2 = K_0\us\x2 + K_bias\us\x2;' Model[25]='' Model[26]='K_x3 = K_0\us\x3 + K_bias\us\x3;' Model[27]='' Model[28]='K_x4 = K_0\us\x4 + K_bias\us\x4;' Model[29]='' Model[30]='K_y1 = K_0\us\y1 + K_bias\us\y1;' Model[31]='' Model[32]='K_z1 = K_0\us\z1 + K_bias\us\z1;' Model[33]='' Model[34]='K_z2 = K_0\us\z2 + K_bias\us\z2;' Model[35]='' Model[36]='K_z3 = K_0\us\z3 + K_bias\us\z3;' Model[37]='' Model[38]='K_z4 = K_0\us\z4 + K_bias\us\z4;' Model[39]='' Model[40]='' CE=1 CTC=1 [Components] CompOrder=3 Comp=64 Comp[0]=c_x_ Comp[1]=c_z_ Comp[2]=m_y1_ Comp[3]=m_x_ Comp[4]=m_z_ Comp[5]=m_y2_ Comp[6]=K_y1_ Comp[7]=R_y1_ Comp[8]=K_b1_ Comp[9]=R_b1_ Comp[10]=K_x1_ Comp[11]=R_x1_ Comp[12]=K_b2_ Comp[13]=R_b2_ Comp[14]=K_z1_ Comp[15]=R_z1_ Comp[16]=\Sigma\K_zi_R_zi_ Comp[17]=\Sigma\K_xi_R_xi_ Comp[18]=c_blank_ Comp[19]=K_x2_ Comp[20]=R_x2_ Comp[21]=K_x3_ Comp[22]=R_x3_ Comp[23]=K_x4_ Comp[24]=R_x4_ Comp[25]=K_z2_ Comp[26]=R_z2_ Comp[27]=K_z3_ Comp[28]=R_z3_ Comp[29]=K_z4_ Comp[30]=R_z4_ Comp[31]=M_Pb\sp\Assay1_ Comp[32]=M_z1_ Comp[33]=M_z2_ Comp[34]=M_z3_ Comp[35]=M_z4_ Comp[36]=m_2_ Comp[37]=d_2_ Comp[38]=m_1_ Comp[39]=w Comp[40]=d_1_ Comp[41]=k_mol_ Comp[42]=K_0\us\b1_ Comp[43]=K_bias\us\b1_ Comp[44]=K_0\us\b2_ Comp[45]=K_bias\us\b2_ Comp[46]=K_0\us\x1_ Comp[47]=K_bias\us\x1_ Comp[48]=K_0\us\x2_ Comp[49]=K_bias\us\x2_ Comp[50]=K_0\us\x3_ Comp[51]=K_bias\us\x3_ Comp[52]=K_0\us\x4_ Comp[53]=K_bias\us\x4_ Comp[54]=K_0\us\y1_ Comp[55]=K_bias\us\y1_ Comp[56]=K_0\us\z1_ Comp[57]=K_bias\us\z1_ Comp[58]=K_0\us\z2_ Comp[59]=K_bias\us\z2_ Comp[60]=K_0\us\z3_ Comp[61]=K_bias\us\z3_ Comp[62]=K_0\us\z4_ Comp[63]=K_bias\us\z4_ [COMP 0] Type=Result Definition='amount content of the sample x' Unit='µmol/g' Description=0 Fcov=1 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=0.0537374307316989 Ustd=0.000179923552577686 Neff=117 HB=1 HC=0 HR=1 IO=0 PictureCount=1 DCount=1 [COMP 1] Type=Temp Definition='amount content of the primary assay standard z' Unit='µmol/g' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=0.0926048385833828 Ustd=2.77700256554276E-5 Neff=166 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 2] Type=TypBNormal Definition='mass of enriched spike in blend b' Unit='g' Description=6 Description[0]='Weighings are performed by a' Description[1]='dedicated mass metrology lab. The procedure applied was a' Description[2]='bracketing technique using calibrated weights and a' Description[3]='comparator. The bracketing technique was repeated at least six times for every' Description[4]='sample mass determination. Buoyancy correction was applied. The uncertainties' Description[5]='from the weighing certificates were treated as standard uncertainties, Type B.' Vnom=1,1360 Uexp=0,0002 Fcov=1 PictureCount=1 DCount=1 [COMP 3] Type=TypBNormal Definition='mass of sample in blend b' Unit='g' Description=6 Description[0]='Weighings are performed by a' Description[1]='dedicated mass metrology lab. The procedure applied was a' Description[2]='bracketing technique using calibrated weights and a' Description[3]='comparator. The bracketing technique was repeated at least six times for every' Description[4]='sample mass determination. Buoyancy correction was applied. The uncertainties' Description[5]='from the weighing certificates were treated as standard uncertainties, Type B.' Vnom=1,0440 Uexp=0,0002 Fcov=1 PictureCount=1 DCount=1 [COMP 4] Type=TypBNormal Definition='mass of primary assay standard in blend b''' Unit='g' Description=6 Description[0]='Weighings are performed by a' Description[1]='dedicated mass metrology lab. The procedure applied was a' Description[2]='bracketing technique using calibrated weights and a' Description[3]='comparator. The bracketing technique was repeated at least six times for every' Description[4]='sample mass determination. Buoyancy correction was applied. The uncertainties' Description[5]='from the weighing certificates were treated as standard uncertainties, Type B.' Vnom=1,1029 Uexp=0,0002 Fcov=1 PictureCount=1 DCount=1 [COMP 5] Type=TypBNormal Definition='mass of enriched spike in blend b''' Unit='g' Description=6 Description[0]='Weighings are performed by a' Description[1]='dedicated mass metrology lab. The procedure applied was a' Description[2]='bracketing technique using calibrated weights and a' Description[3]='comparator. The bracketing technique was repeated at least six times for every' Description[4]='sample mass determination. Buoyancy correction was applied. The uncertainties' Description[5]='from the weighing certificates were treated as standard uncertainties, Type B.' Vnom=1,0654 Uexp=0,0002 Fcov=1 PictureCount=1 DCount=1 [COMP 6] Type=Temp Definition='mass bias correction of R_y1' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=0.9999 Ustd=0.00133463478150391 Neff=29 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 7] Type=TypASum Definition='measured ratio of enriched isotope to reference isotope in the enriched spike, n(^208^Pb)/n(^206^Pb)' Unit='' Description=2 Description[0]='Each ratio has been measured 8' Description[1]='times. The experimental uncertainty is therefore divided by sqrt(8).' Vnom=0,00064 Ustd==0.00004/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 8] Type=Temp Definition='mass bias correction of R_b1' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=0.9987 Ustd=0.00133463478150391 Neff=29 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 9] Type=TypASum Definition='measured ratio of blend b, n(^208^Pb)/n(^206^Pb)' Unit='' Description=2 Description[0]='Each ratio has been measured 8' Description[1]='times. The experimental uncertainty is therefore divided by sqrt(8).' Vnom=0,29360 Ustd==0.00073/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 10] Type=Temp Definition='mass bias correction of R_x1' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=0.9992 Ustd=0.00133463478150391 Neff=29 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 11] Type=TypASum Definition='measured ratio of enriched isotope to reference isotope in the sample x, n(^208^Pb)/n(^206^Pb)' Unit='' Description=2 Description[0]='Each ratio has been measured 8' Description[1]='times. The experimental uncertainty is therefore divided by sqrt(8).' Vnom=2,1402 Ustd==0.0054/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 12] Type=Temp Definition='mass bias correction of R_b2' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=0.9983 Ustd=0.00133463478150391 Neff=29 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 13] Type=TypASum Definition='measured ratio of blend b'', n(^208^Pb)/n(^206^Pb)' Unit='' Description=2 Description[0]='Each ratio has been measured 8' Description[1]='times. The experimental uncertainty is therefore divided by sqrt(8).' Vnom=0,5050 Ustd==0.0013/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 14] Type=Temp Definition='mass bias correction of R_z1' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=0.9989 Ustd=0.00133463478150391 Neff=29 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 15] Type=TypASum Definition='measured ratio of enriched isotope to reference isotope in the primary assay standard z, n(^208^Pb)/n(^206^Pb)' Unit='' Description=2 Description[0]='Each ratio has been measured 8' Description[1]='times. The experimental uncertainty is therefore divided by sqrt(8).' Vnom=2,1429 Ustd==0.0054/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 16] Type=Temp Definition='sum of all mass bias corrected ratios of the primary assay standard' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=4.11331426 Ustd=0.00390471979358154 Neff=50 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 17] Type=Temp Definition='sum of all mass bias corrected ratios of the sample' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=4.11212253 Ustd=0.00390245418178901 Neff=50 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 18] Type=TypASum Definition='observed amount content in procedure blank' Unit='µmol/g' Description=3 Description[0]='The procedure blank was measured using external calibration. The procedure' Description[1]='blank was measured four times. The experimental standard deviation is divided' Description[2]='by sqrt(4) to obtain the standard uncertainty.' Vnom=4,5e-7 Ustd==4.0e-7/sqrt(4) Neff=3 PictureCount=1 DCount=1 [COMP 19] Type=Temp Definition='mass bias correction of R_x2' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=1 Ustd=0 Neff=10000 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 20] Type=Const Definition='measured ratio of sample, n(^206^Pb)/n(^206^Pb)' Unit='' Description=1 Description[0]='This is the ratio of n(^206^Pb)/n(^206^Pb), which is by definition equal to 1.' Vnom=1 PictureCount=1 DCount=1 [COMP 21] Type=Temp Definition='mass bias correction of R_x3' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=1.0004 Ustd=0.00159099025766973 Neff=18 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 22] Type=TypASum Definition='measured ratio of sample, n(^207^Pb)/n(^206^Pb)' Unit='' Description=2 Description[0]='Each ratio has been measured 8' Description[1]='times. The experimental uncertainty is therefore divided by sqrt(8).' Vnom=0,9142 Ustd==0.0032/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 23] Type=Temp Definition='mass bias correction of R_x4' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=1.001 Ustd=0.00234520787991171 Neff=10 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 24] Type=TypASum Definition='measured ratio of sample, n(^204^Pb)/n(^206^Pb)' Unit='' Description=2 Description[0]='Each ratio has been measured 8' Description[1]='times. The experimental uncertainty is therefore divided by sqrt(8).' Vnom=0,05901 Ustd==0.00035/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 25] Type=Temp Definition='mass bias correction of R_z2' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=1 Ustd=0 Neff=10000 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 26] Type=Const Definition='measured ratio of sample, n(^206^Pb)/n(^206^Pb)' Unit='' Description=1 Description[0]='This is the ratio of n(^206^Pb)/n(^206^Pb), which is by definition equal to 1.' Vnom=1 PictureCount=1 DCount=1 [COMP 27] Type=Temp Definition='mass bias correction of R_z3' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=0.9993 Ustd=0.00159099025766973 Neff=18 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 28] Type=TypASum Definition='measured ratio of sample, n(^207^Pb)/n(^206^Pb)' Unit='' Description=2 Description[0]='Each ratio has been measured 8' Description[1]='times. The experimental uncertainty is therefore divided by sqrt(8).' Vnom=0,9147 Ustd==0.0032/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 29] Type=Temp Definition='mass bias correction of R_z4' Unit='' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=1.0002 Ustd=0.00234520787991171 Neff=10 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 30] Type=TypASum Definition='measured ratio of sample, n(^204^Pb)/n(^206^Pb)' Unit='' Description=2 Description[0]='Each ratio has been measured 8' Description[1]='times. The experimental uncertainty is therefore divided by sqrt(8).' Vnom=0,05870 Ustd==0.00035/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 31] Type=Temp Definition='molar mass of the primary assay standard' Unit='g/mol' Description=0 Fcov=2 NomUnit= UncUnit= CovID=0 UncID=0 Vnom=207.210344797368 Ustd=0.000665108286755588 Neff=38 HB=0 HC=0 HR=0 IO=0 PictureCount=1 DCount=1 [COMP 32] Type=TypBNormal Definition='nuclidic mass of ^208^Pb' Unit='g/mol' Description=2 Description[0]='The nuclidic masses and their respective uncertainties are taken from' Description[1]='literature. G. Audi and A. H. Wapstra, Nuclear Physics, A565 (1993).' Vnom=207,976636 Uexp=0,000003 Fcov=1 PictureCount=1 DCount=1 [COMP 33] Type=TypBNormal Definition='nuclidic mass of ^206^Pb' Unit='g/mol' Description=2 Description[0]='The nuclidic masses and their respective uncertainties are taken from' Description[1]='literature. G. Audi and A. H. Wapstra, Nuclear Physics, A565 (1993).' Vnom=205,974449 Uexp=0,000003 Fcov=1 PictureCount=1 DCount=1 [COMP 34] Type=TypBNormal Definition='nuclidic mass of ^207^Pb' Unit='g/mol' Description=2 Description[0]='The nuclidic masses and their respective uncertainties are taken from' Description[1]='literature. G. Audi and A. H. Wapstra, Nuclear Physics, A565 (1993).' Vnom=206,975880 Uexp=0,000003 Fcov=1 PictureCount=1 DCount=1 [COMP 35] Type=TypBNormal Definition='nuclidic mass of ^204^Pb' Unit='g/mol' Description=2 Description[0]='The nuclidic masses and their respective uncertainties are taken from' Description[1]='literature. G. Audi and A. H. Wapstra, Nuclear Physics, A565 (1993).' Vnom=203,973028 Uexp=0,000003 Fcov=1 PictureCount=1 DCount=1 [COMP 36] Type=TypBNormal Definition='aliquot of the first dilution of the primary assay standard' Unit='g' Description=6 Description[0]='Weighings are performed by a' Description[1]='dedicated mass metrology lab. The procedure applied was a' Description[2]='bracketing technique using calibrated weights and a' Description[3]='comparator. The bracketing technique was repeated at least six times for every' Description[4]='sample mass determination. Buoyancy correction was applied. The uncertainties' Description[5]='from the weighing certificates were treated as standard uncertainties, Type B.' Vnom=1,0292 Uexp=0,0002 Fcov=1 PictureCount=1 DCount=1 [COMP 37] Type=TypBNormal Definition='total mass of the second dilution of the primary assay standard' Unit='g' Description=6 Description[0]='Weighings are performed by a' Description[1]='dedicated mass metrology lab. The procedure applied was a' Description[2]='bracketing technique using calibrated weights and a' Description[3]='comparator. The bracketing technique was repeated at least six times for every' Description[4]='sample mass determination. Buoyancy correction was applied. The uncertainties' Description[5]='from the weighing certificates were treated as standard uncertainties, Type B.' Vnom=99,931 Uexp=0,01 Fcov=1 PictureCount=1 DCount=1 [COMP 38] Type=TypBNormal Definition='mass of the lead piece for primary assay standard' Unit='g' Description=6 Description[0]='Weighings are performed by a' Description[1]='dedicated mass metrology lab. The procedure applied was a' Description[2]='bracketing technique using calibrated weights and a' Description[3]='comparator. The bracketing technique was repeated at least six times for every' Description[4]='sample mass determination. Buoyancy correction was applied. The uncertainties' Description[5]='from the weighing certificates were treated as standard uncertainties, Type B.' Vnom=0,36544 Uexp=0,00005 Fcov=1 PictureCount=1 DCount=1 [COMP 39] Type=TypBNormal Definition='purity of the metallic lead piece, expressed as mass fraction' Unit='g/g' Description=2 Description[0]='The purity of the metalic lead can be obtained through analysis or a' Description[1]='supplier''s certificate.' Vnom=0,99999 Uexp=0,000005 Fcov=1 PictureCount=1 DCount=1 [COMP 40] Type=TypBNormal Definition='total mass of first dilution of the primary assay standard' Unit='g' Description=6 Description[0]='Weighings are performed by a' Description[1]='dedicated mass metrology lab. The procedure applied was a' Description[2]='bracketing technique using calibrated weights and a' Description[3]='comparator. The bracketing technique was repeated at least six times for every' Description[4]='sample mass determination. Buoyancy correction was applied. The uncertainties' Description[5]='from the weighing certificates were treated as standard uncertainties, Type B.' Vnom=196,14 Uexp=0,03 Fcov=1 PictureCount=1 DCount=1 [COMP 41] Type=Const Definition='conversion factor 10^6 µmol = 1 mol' Unit='µmol/mol' Description=0 Vnom=1E6 PictureCount=0 DCount=0 [COMP 42] Type=TypASum Definition='mass bias correction of R_b1 as determined at time 0' Unit='' Description=14 Description[0]='The K_0_''s are measured using a' Description[1]='certfied isotopic reference material, and they are calculated according to the' Description[2]='following equation:' Description[3]='' Description[4]='K_0 =' Description[5]='R_certified/R_observed' Description[6]='' Description[7]='When looking at the uncertainty contributions of R_certified and R_observed, it' Description[8]='is clear that the contribution of R_certified can be neglected for this' Description[9]='example. Henceforth, the uncertainties on the measured ratios, R_observed_, are' Description[10]='used for the uncertainties on K_0.' Description[11]='' Description[12]='The original measurement data for the determination of K_0 is not shown in this' Description[13]='example.' Vnom=0,9987 Ustd==0.0025/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 43] Type=TypBNormal Definition='other contributions to the mass bias of R_b1' Unit='' Description=10 Description[0]='This bias factor is introduced to account for possible deviations in the value' Description[1]='of the mass discrimination factor (these could be variations over time, as well' Description[2]='as other sources of bias, such as multiplier dead time correction, matrix' Description[3]='effects etc.). The values of these biases are not known in this case, but they' Description[4]='are assumed to be around 0, therefore a' Description[5]='value of 0' Description[6]='is applied. An uncertainty is associated to this bias, which is estimated from' Description[7]='experience. In this case a' Description[8]='standard uncertainty of 0.001 is considered to be sufficient to cover all' Description[9]='effects.' Vnom=0 Uexp=0,001 Fcov=1 PictureCount=1 DCount=1 [COMP 44] Type=TypASum Definition='mass bias correction of R_b2 as determined at time 0' Unit='' Description=14 Description[0]='The K_0_''s are measured using a' Description[1]='certfied isotopic reference material, and they are calculated according to the' Description[2]='following equation:' Description[3]='' Description[4]='K_0 =' Description[5]='R_certified/R_observed' Description[6]='' Description[7]='When looking at the uncertainty contributions of R_certified and R_observed, it' Description[8]='is clear that the contribution of R_certified can be neglected for this' Description[9]='example. Henceforth, the uncertainties on the measured ratios, R_observed_, are' Description[10]='used for the uncertainties on K_0.' Description[11]='' Description[12]='The original measurement data for the determination of K_0 is not shown in this' Description[13]='example.' Vnom=0,9983 Ustd==0.0025/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 45] Type=TypBNormal Definition='other contributions to the mass bias of R_b2' Unit='' Description=10 Description[0]='This bias factor is introduced to account for possible deviations in the value' Description[1]='of the mass discrimination factor (these could be variations over time, as well' Description[2]='as other sources of bias, such as multiplier dead time correction, matrix' Description[3]='effects etc.). The values of these biases are not known in this case, but they' Description[4]='are assumed to be around 0, therefore a' Description[5]='value of 0' Description[6]='is applied. An uncertainty is associated to this bias, which is estimated from' Description[7]='experience. In this case a' Description[8]='standard uncertainty of 0.001 is considered to be sufficient to cover all' Description[9]='effects.' Vnom=0 Uexp=0,001 Fcov=1 PictureCount=1 DCount=1 [COMP 46] Type=TypASum Definition='mass bias correction of R_x1 as determined at time 0' Unit='' Description=14 Description[0]='The K_0_''s are measured using a' Description[1]='certfied isotopic reference material, and they are calculated according to the' Description[2]='following equation:' Description[3]='' Description[4]='K_0 =' Description[5]='R_certified/R_observed' Description[6]='' Description[7]='When looking at the uncertainty contributions of R_certified and R_observed, it' Description[8]='is clear that the contribution of R_certified can be neglected for this' Description[9]='example. Henceforth, the uncertainties on the measured ratios, R_observed_, are' Description[10]='used for the uncertainties on K_0.' Description[11]='' Description[12]='The original measurement data for the determination of K_0 is not shown in this' Description[13]='example.' Vnom=0,9992 Ustd==0.0025/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 47] Type=TypBNormal Definition='other contributions to the mass bias of R_x1' Unit='' Description=10 Description[0]='This bias factor is introduced to account for possible deviations in the value' Description[1]='of the mass discrimination factor (these could be variations over time, as well' Description[2]='as other sources of bias, such as multiplier dead time correction, matrix' Description[3]='effects etc.). The values of these biases are not known in this case, but they' Description[4]='are assumed to be around 0, therefore a' Description[5]='value of 0' Description[6]='is applied. An uncertainty is associated to this bias, which is estimated from' Description[7]='experience. In this case a' Description[8]='standard uncertainty of 0.001 is considered to be sufficient to cover all' Description[9]='effects.' Vnom=0 Uexp=0,001 Fcov=1 PictureCount=1 DCount=1 [COMP 48] Type=Const Definition='mass bias correction of R_x2 as determined at time 0' Unit='' Description=4 Description[0]='This mass bias correction refers to the ratio of n(^206^Pb)/n(^206^Pb), which' Description[1]='is by definition equal to 1' Description[2]='and not measured. Therefore no mass bias correction is needed, the factor is' Description[3]='equal to 1.' Vnom=1 PictureCount=1 DCount=1 [COMP 49] Type=Const Definition='other contributions to the mass bias of R_x2' Unit='' Description=4 Description[0]='This mass bias correction refers to the ratio of n(^206^Pb)/n(^206^Pb), which' Description[1]='is by definition equal to 1' Description[2]='and not measured. Therefore no mass bias correction is needed, this factor is' Description[3]='equal to 0.' Vnom=0 PictureCount=1 DCount=1 [COMP 50] Type=TypASum Definition='mass bias correction of R_x3 as determined at time 0' Unit='' Description=14 Description[0]='The K_0_''s are measured using a' Description[1]='certfied isotopic reference material, and they are calculated according to the' Description[2]='following equation:' Description[3]='' Description[4]='K_0 =' Description[5]='R_certified/R_observed' Description[6]='' Description[7]='When looking at the uncertainty contributions of R_certified and R_observed, it' Description[8]='is clear that the contribution of R_certified can be neglected for this' Description[9]='example. Henceforth, the uncertainties on the measured ratios, R_observed_, are' Description[10]='used for the uncertainties on K_0.' Description[11]='' Description[12]='The original measurement data for the determination of K_0 is not shown in this' Description[13]='example.' Vnom=1,0004 Ustd==0.0035/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 51] Type=TypBNormal Definition='other contributions to the mass bias of R_x3' Unit='' Description=10 Description[0]='This bias factor is introduced to account for possible deviations in the value' Description[1]='of the mass discrimination factor (these could be variations over time, as well' Description[2]='as other sources of bias, such as multiplier dead time correction, matrix' Description[3]='effects etc.). The values of these biases are not known in this case, but they' Description[4]='are assumed to be around 0, therefore a' Description[5]='value of 0' Description[6]='is applied. An uncertainty is associated to this bias, which is estimated from' Description[7]='experience. In this case a' Description[8]='standard uncertainty of 0.001 is considered to be sufficient to cover all' Description[9]='effects.' Vnom=0 Uexp=0,001 Fcov=1 PictureCount=1 DCount=1 [COMP 52] Type=TypASum Definition='mass bias correction of R_x4 as determined at time 0' Unit='' Description=14 Description[0]='The K_0_''s are measured using a' Description[1]='certfied isotopic reference material, and they are calculated according to the' Description[2]='following equation:' Description[3]='' Description[4]='K_0 =' Description[5]='R_certified/R_observed' Description[6]='' Description[7]='When looking at the uncertainty contributions of R_certified and R_observed, it' Description[8]='is clear that the contribution of R_certified can be neglected for this' Description[9]='example. Henceforth, the uncertainties on the measured ratios, R_observed_, are' Description[10]='used for the uncertainties on K_0.' Description[11]='' Description[12]='The original measurement data for the determination of K_0 is not shown in this' Description[13]='example.' Vnom=1,001 Ustd==0.006/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 53] Type=TypBNormal Definition='other contributions to the mass bias of R_x4' Unit='' Description=10 Description[0]='This bias factor is introduced to account for possible deviations in the value' Description[1]='of the mass discrimination factor (these could be variations over time, as well' Description[2]='as other sources of bias, such as multiplier dead time correction, matrix' Description[3]='effects etc.). The values of these biases are not known in this case, but they' Description[4]='are assumed to be around 0, therefore a' Description[5]='value of 0' Description[6]='is applied. An uncertainty is associated to this bias, which is estimated from' Description[7]='experience. In this case a' Description[8]='standard uncertainty of 0.001 is considered to be sufficient to cover all' Description[9]='effects.' Vnom=0 Uexp=0,001 Fcov=1 PictureCount=1 DCount=1 [COMP 54] Type=TypASum Definition='mass bias correction of R_y1 as determined at time 0' Unit='' Description=14 Description[0]='The K_0_''s are measured using a' Description[1]='certfied isotopic reference material, and they are calculated according to the' Description[2]='following equation:' Description[3]='' Description[4]='K_0 =' Description[5]='R_certified/R_observed' Description[6]='' Description[7]='When looking at the uncertainty contributions of R_certified and R_observed, it' Description[8]='is clear that the contribution of R_certified can be neglected for this' Description[9]='example. Henceforth, the uncertainties on the measured ratios, R_observed_, are' Description[10]='used for the uncertainties on K_0.' Description[11]='' Description[12]='The original measurement data for the determination of K_0 is not shown in this' Description[13]='example.' Vnom=0,9999 Ustd==0.0025/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 55] Type=TypBNormal Definition='other contributions to the mass bias of R_y1' Unit='' Description=10 Description[0]='This bias factor is introduced to account for possible deviations in the value' Description[1]='of the mass discrimination factor (these could be variations over time, as well' Description[2]='as other sources of bias, such as multiplier dead time correction, matrix' Description[3]='effects etc.). The values of these biases are not known in this case, but they' Description[4]='are assumed to be around 0, therefore a' Description[5]='value of 0' Description[6]='is applied. An uncertainty is associated to this bias, which is estimated from' Description[7]='experience. In this case a' Description[8]='standard uncertainty of 0.001 is considered to be sufficient to cover all' Description[9]='effects.' Vnom=0 Uexp=0,001 Fcov=1 PictureCount=1 DCount=1 [COMP 56] Type=TypASum Definition='mass bias correction of R_z1 as determined at time 0' Unit='' Description=14 Description[0]='The K_0_''s are measured using a' Description[1]='certfied isotopic reference material, and they are calculated according to the' Description[2]='following equation:' Description[3]='' Description[4]='K_0 =' Description[5]='R_certified/R_observed' Description[6]='' Description[7]='When looking at the uncertainty contributions of R_certified and R_observed, it' Description[8]='is clear that the contribution of R_certified can be neglected for this' Description[9]='example. Henceforth, the uncertainties on the measured ratios, R_observed_, are' Description[10]='used for the uncertainties on K_0.' Description[11]='' Description[12]='The original measurement data for the determination of K_0 is not shown in this' Description[13]='example.' Vnom=0,9989 Ustd==0.0025/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 57] Type=TypBNormal Definition='other contributions to the mass bias of R_z1' Unit='' Description=10 Description[0]='This bias factor is introduced to account for possible deviations in the value' Description[1]='of the mass discrimination factor (these could be variations over time, as well' Description[2]='as other sources of bias, such as multiplier dead time correction, matrix' Description[3]='effects etc.). The values of these biases are not known in this case, but they' Description[4]='are assumed to be around 0, therefore a' Description[5]='value of 0' Description[6]='is applied. An uncertainty is associated to this bias, which is estimated from' Description[7]='experience. In this case a' Description[8]='standard uncertainty of 0.001 is considered to be sufficient to cover all' Description[9]='effects.' Vnom=0 Uexp=0,001 Fcov=1 PictureCount=1 DCount=1 [COMP 58] Type=Const Definition='mass bias correction of R_z2 as determined at time 0' Unit='' Description=4 Description[0]='This mass bias correction refers to the ratio of n(^206^Pb)/n(^206^Pb), which' Description[1]='is by definition equal to 1' Description[2]='and not measured. Therefore no mass bias correction is needed, the factor is' Description[3]='equal to 1.' Vnom=1 PictureCount=1 DCount=1 [COMP 59] Type=Const Definition='other contributions to the mass bias of R_z2' Unit='' Description=4 Description[0]='This mass bias correction refers to the ratio of n(^206^Pb)/n(^206^Pb), which' Description[1]='is by definition equal to 1' Description[2]='and not measured. Therefore no mass bias correction is needed, this factor is' Description[3]='equal to 0.' Vnom=0 PictureCount=1 DCount=1 [COMP 60] Type=TypASum Definition='mass bias correction of R_z3 as determined at time 0' Unit='' Description=14 Description[0]='The K_0_''s are measured using a' Description[1]='certfied isotopic reference material, and they are calculated according to the' Description[2]='following equation:' Description[3]='' Description[4]='K_0 =' Description[5]='R_certified/R_observed' Description[6]='' Description[7]='When looking at the uncertainty contributions of R_certified and R_observed, it' Description[8]='is clear that the contribution of R_certified can be neglected for this' Description[9]='example. Henceforth, the uncertainties on the measured ratios, R_observed_, are' Description[10]='used for the uncertainties on K_0.' Description[11]='' Description[12]='The original measurement data for the determination of K_0 is not shown in this' Description[13]='example.' Vnom=0,9993 Ustd==0.0035/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 61] Type=TypBNormal Definition='other contributions to the mass bias of R_z3' Unit='' Description=10 Description[0]='This bias factor is introduced to account for possible deviations in the value' Description[1]='of the mass discrimination factor (these could be variations over time, as well' Description[2]='as other sources of bias, such as multiplier dead time correction, matrix' Description[3]='effects etc.). The values of these biases are not known in this case, but they' Description[4]='are assumed to be around 0, therefore a' Description[5]='value of 0' Description[6]='is applied. An uncertainty is associated to this bias, which is estimated from' Description[7]='experience. In this case a' Description[8]='standard uncertainty of 0.001 is considered to be sufficient to cover all' Description[9]='effects.' Vnom=0 Uexp=0,001 Fcov=1 PictureCount=1 DCount=1 [COMP 62] Type=TypASum Definition='mass bias correction of R_z4 as determined at time 0' Unit='' Description=14 Description[0]='The K_0_''s are measured using a' Description[1]='certfied isotopic reference material, and they are calculated according to the' Description[2]='following equation:' Description[3]='' Description[4]='K_0 =' Description[5]='R_certified/R_observed' Description[6]='' Description[7]='When looking at the uncertainty contributions of R_certified and R_observed, it' Description[8]='is clear that the contribution of R_certified can be neglected for this' Description[9]='example. Henceforth, the uncertainties on the measured ratios, R_observed_, are' Description[10]='used for the uncertainties on K_0.' Description[11]='' Description[12]='The original measurement data for the determination of K_0 is not shown in this' Description[13]='example.' Vnom=1,0002 Ustd==0.006/sqrt(8) Neff=7 PictureCount=1 DCount=1 [COMP 63] Type=TypBNormal Definition='other contributions to the mass bias of R_z4' Unit='' Description=10 Description[0]='This bias factor is introduced to account for possible deviations in the value' Description[1]='of the mass discrimination factor (these could be variations over time, as well' Description[2]='as other sources of bias, such as multiplier dead time correction, matrix' Description[3]='effects etc.). The values of these biases are not known in this case, but they' Description[4]='are assumed to be around 0, therefore a' Description[5]='value of 0' Description[6]='is applied. An uncertainty is associated to this bias, which is estimated from' Description[7]='experience. In this case a' Description[8]='standard uncertainty of 0.001 is considered to be sufficient to cover all' Description[9]='effects.' Vnom=0 Uexp=0,001 Fcov=1 PictureCount=1 DCount=1 [Correlations] Description=0 [CalCorr] CNT=123 R[0,1]=0.0854129 R[0,6]=-0.0003653 R[0,8]=0.4634317 R[0,10]=-0.2548633 R[0,12]=-0.5228175 R[0,14]=0.3135621 R[0,16]=0.2680793 R[0,17]=-0.2058944 R[0,21]=0.1056417 R[0,23]=0.0100516 R[0,27]=-0.1055493 R[0,29]=-0.0098397 R[0,31]=0.3868842 R[1,14]=-0.0085746 R[1,16]=-0.0081639 R[1,27]=0.001335 R[1,29]=0.0017436 R[1,31]=-0.0107038 R[10,17]=0.7319459 R[14,16]=0.7324441 R[14,31]=0.8010766 R[16,27]=0.3726974 R[16,29]=0.0352557 R[16,31]=0.7627129 R[17,21]=0.3727099 R[17,23]=0.0354625 R[27,31]=-0.124721 R[29,31]=-0.1628997 R[0,45]=-0.3917308 R[0,13]=-0.3559227 R[0,43]=0.3472349 R[0,44]=-0.3462443 R[0,42]=0.3069152 R[0,9]=0.3048458 R[0,57]=0.2349423 R[0,15]=0.2090885 R[0,56]=0.2076616 R[0,47]=-0.1909611 R[0,11]=-0.1702126 R[0,46]=-0.1687873 R[0,22]=0.0822063 R[0,50]=0.0821657 R[0,60]=-0.0820939 R[0,28]=-0.0819992 R[0,51]=0.0663999 R[0,61]=-0.0663419 R[0,36]=0.0580394 R[0,3]=-0.0572166 R[0,5]=-0.0560673 R[0,4]=0.054161 R[0,2]=0.0525829 R[0,40]=-0.0456823 R[0,38]=0.0408645 R[0,37]=-0.0298877 R[0,52]=0.009092 R[0,24]=0.0089967 R[0,62]=-0.0089003 R[0,30]=-0.0088465 R[0,7]=-0.0060471 R[0,53]=0.004286 R[0,63]=-0.0041957 R[0,39]=0.0014934 R[0,18]=-0.0011116 R[1,36]=0.6480188 R[1,40]=-0.5100497 R[1,38]=0.4562589 R[1,37]=-0.3337007 R[1,39]=0.0166737 R[1,57]=-0.0064247 R[1,15]=-0.0057177 R[1,56]=-0.0056786 R[1,62]=0.0015772 R[1,30]=0.0015677 R[1,60]=0.0010383 R[1,28]=0.0010371 R[6,55]=0.7492686 R[6,54]=0.6622662 R[8,43]=0.7492686 R[8,42]=0.6622662 R[10,47]=0.7492686 R[10,46]=0.6622662 R[12,45]=0.7492686 R[12,44]=0.6622662 R[14,57]=0.7492686 R[14,56]=0.6622662 R[16,57]=0.5487974 R[16,15]=0.4884059 R[16,56]=0.4850729 R[16,60]=0.2898757 R[16,28]=0.2895416 R[16,61]=0.234255 R[16,62]=0.03189 R[16,30]=0.0316971 R[16,63]=0.0150331 R[17,47]=0.5484241 R[17,11]=0.4888362 R[17,46]=0.484743 R[17,22]=0.2900286 R[17,50]=0.2898855 R[17,51]=0.2342628 R[17,52]=0.032077 R[17,24]=0.0317409 R[17,53]=0.0151213 R[21,50]=0.7777778 R[21,51]=0.6285394 R[23,52]=0.904534 R[23,53]=0.4264014 R[27,60]=0.7777778 R[27,61]=0.6285394 R[29,62]=0.904534 R[29,63]=0.4264014 R[31,57]=0.6002216 R[31,15]=0.5341712 R[31,56]=0.5305259 R[31,62]=-0.1473484 R[31,30]=-0.1464572 R[31,60]=-0.0970052 R[31,28]=-0.0968934 R[31,61]=-0.0783921 R[31,63]=-0.0694607 R[31,32]=0.0023473 R[31,33]=0.0010966 R[31,34]=0.0010023