AOAC-RI ERP Book - FAOM METHOD.pdf

Table 2. Certified Mass Fraction Values for Selected PCB Congeners (a) in SRM 1974c

k

Mass Fraction (b,c,d) (μg/kg)

Wet-Mass Basis 0.191 r 0.003 0.589 r 0.007 1.47 r 0.02 1.16 r 0.06 1.54 r 0.08 0.214 r 0.019 1.76 r 0.02 2.49 r 0.06 0.663 r 0.008 0.137 r 0.013 1.65 r 0.02 1.57 r 0.05 0.850 r 0.011 0.507 r 0.008 2.08 r 0.02 1.06 r 0.02 1.82 r 0.02 3.55 r 0.05 6.67 r 0.05 1.57 r 0.03 5.47 r 0.06 4.08 r 0.09 0.801 r 0.011 4.39 r 0.04 0.904 r 0.005 3.97 r 0.04 1.13 r 0.03 6.76 r 0.12 0.253 r 0.005 0.443 r 0.003 1.10 r 0.09 0.105 r 0.009 0.696 r 0.011 0.350 r 0.011 0.594 r 0.008 0.848 r 0.006 2.09 r 0.05

Dry-Mass Basis

PCB 8 (2,4'-Dichlorobiphenyl) PCB 18 (2,2',5-Trichlorobiphenyl) PCB 28 (2,4,4'-Trichlorobiphenyl) PCB 31 (2,4',5-Trichlorobiphenyl) PCB 44 (2,2'3,5'-Tetrachlorobiphenyl) PCB 45 (2,2',3,6-Tetrachlorobiphenyl) PCB 49 (2,2',4,5'-Tetrachlorobiphenyl) PCB 52 (2,2',5,5'-Tetrachlorobiphenyl) PCB 56 (2,3,3',4'-Tetrachlorobiphenyl) PCB 63 (2,3,4',5-Tetrachlorobiphenyl) PCB 66 (2,3',4,4'-Tetrachlorobiphenyl) PCB 70 (2,3',4',5-Tetrachlorobiphenyl) PCB 74 (2,4,4',5-Tetrachlorobiphenyl) PCB 82 (2,2',3,3',4-Pentachlorobiphenyl) PCB 87 (2,2',3,4,5'-Pentachlorobiphenyl) PCB 92 (2,2',3,5,5'-Pentachlorobiphenyl) PCB 95 (2,2',3,5',6-Pentachlorobiphenyl) PCB 99 (2,2',4,4'5-Pentachlorobiphenyl) PCB 101 (2,2',4,5,5'-Pentachlorobiphenyl) PCB 105 (2,3,3',4,4'-Pentachlorobiphenyl) PCB 110 (2,3,3',4',6-Pentachlorobiphenyl) PCB 118 (2,3',4,4',5-Pentachlorobiphenyl) PCB 128 (2,2',3,3',4,4'-Hexachlorobiphenyl) PCB 138 (2,2',3,4,4',5'-Hexachlorobiphenyl) PCB 146 (2,2',3,4',5,5'-Hexachlorobiphenyl) PCB 149 (2,2',3,4',5',6-Hexachlorobiphenyl) PCB 151 (2,2',3,5,5',6-Hexachlorobiphenyl) PCB 153 (2,2',4,4',5,5'-Hexachlorobiphenyl) (a) 132 (2,2',3,3',4,6'-Hexachlorobiphenyl) PCB 156 (2,3,3',4,4',5-Hexachlorobiphenyl) PCB 158 (2,3,3',4,4',6-Hexachlorobiphenyl) PCB 163 (2,3,3',4',5,6-Hexachlorobiphenyl) PCB 170 (2,2',3,3',4,4',5-Heptachlorobiphenyl) PCB 177 (2,2'3,3',4',5,6-Heptachlorobiphenyl) PCB 178 (2,2',3,3',5,5',6-Heptachlorobiphenyl) PCB 180 (2,2',3,4,4',5,5'-Heptachlorobiphenyl) PCB 183 (2,2',3,4,4'5',6-Heptachlorobiphenyl) PCB 187 (2,2',3,4',5,5',6-Heptachlorobiphenyl)

1.97 1.97 1.97 1.97 1.97 1.96 1.97 1.97 1.98 1.97 2.05 1.97 1.96 1.97 2.01 1.97 2.15 1.97 1.97 1.97 1.97 1.97 1.97 1.97 1.97 1.97 1.96 1.97 1.96 1.98 1.96 1.97 1.97 1.97 1.97 1.98

1.86 r 5.75 r 14.4 r 11.3 r 15.1 r 2.09 r 17.1 r 24.3 r 6.46 r 1.34 r 16.1 r 15.3 r 8.29 r 4.95 r 20.3 r 10.4 r 17.8 r 34.7 r 65.1 r 15.3 r 53.4 r 39.8 r 7.81 r 42.9 r 8.82 r 38.8 r 11.0 r 66.0 r 2.47 r 4.33 r 10.8 r 1.03 r 6.79 r 3.42 r 5.79 r 8.27 r 20.4 r

0.03 0.08 0.2 0.6 0.8 0.2 0.6 0.18 0.09 0.13

0.2 0.5

0.12 0.09

0.2 0.2 0.2 0.6 0.7 0.3 0.7 0.9

0.11

0.5

0.09

0.5 0.3 1.3

0.05 0.04 0.09 0.12 0.11 0.09 0.09 0.9

0.5 1.97 (a) PCB congeners are numbered according to the scheme proposed by Ballschmiter and Zell [8] and later revised by Schulte and Malisch [9] to conform with IUPAC rules; for the specific congeners mentioned in this table, the Ballschmiter-Zell numbers correspond to those of Schulte and Malisch. When two or more congeners are known to coelute under the GC analysis conditions used, the PCB congener listed first is the major component and the additional congeners may be present as minor components. The quantitative results are based on the response of the congener listed first. (b) Mass fractions are reported on both wet- and dry-mass basis; material as received contains 89.75 % r 0.08 % (95 % confidence level) water. (c) The certified value reported on a wet-mass basis is a weighted mean of average mass fractions, with one average each from two analytical methods [3,4]. The expanded uncertainty is the half width of a symmetric 95 % parametric bootstrap confidence interval [5], which is consistent with the ISO Guide [6,7]. The effective coverage factor k is included in the table for each PCB congener. (d) GC/MS (Ia) using SPE clean-up followed by analysis on a DB-17MS column using EI-MS and GC/MS (IIa) using SPE and SEC clean-up followed by analysis on a DB-XLB column using EI-MS.

SRM 1974c

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