RtxPresentations07 - page 396-397

Analysis
Sample chromatograms are shown for the separation of several PCBs and dioxins by chlorination level. PCB data for the
analysis of two referencematerials (sediment and biota) are summarized in the tables below. Thismethodwas also evaluated
for three different extracts, soil, biota, and air versus the conventional separation on the 60M column. This data appears as a
comparison of the “fast”method to the “conventional”method in the table.
Analysis of PCBCongenerReference Sediment EC-3
PCBCongener ExpectedValue ng/g N AverageValue
18 9.0+/- 4.7 8 9.2
28 18.6+/- 8.6 8 14.7
52 35.6 +/- 12.9 8 28.9
105 13.1 +/- 4.3 8 18.9
118 28.5 +/- 5.4 8 28.6
138 25.2 +/- 6.3 8 26.0
153 24.2 +/- 4.1 8 22.6
170 8.9+/- 1.3 8 9.6
180 15.4 +/- 6.6 8 13.7
Extract Compound Conventional GC/HRMS (60M) Fast GC/HRMS (40M)
Soil 2,3,7,8-T4CDD 2.2 ppt 2.3 ppt
Fish 2,3,7,8-T4CDD 14 ppt 13 ppt
Air 1,2,3,7,8-P5 CDD 0.093 pg/M 3 0.093 pg/M3