Separation of 26 toxaphene congeners and measurement in air particulate matter SRMs compared to technical toxaphene SRM 3067 |
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Authors: | Stacy S Vander Pol John R Kucklick Stefan D Leigh Barbara J Porter Michele M Schantz |
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Institution: | (1) Analytical Chemistry Division, Hollings Marine Laboratory, National Institute of Standards and Technology, 331 Fort Johnson Road, Charleston, SC 29412, USA;(2) Statistical Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA;(3) Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA |
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Abstract: | Toxaphene is a complex technical mixture that has been found ubiquitously in the environment but has caused issues for analysis,
especially of individual congeners. This paper reports the elution order of 26 major toxaphene congeners on three gas chromatographic
columns. The three different stationary phases generally had similar elution orders for the toxaphene congeners, but fewer
co-elutions occurred on a low-bleed, low-polarity column. These congeners (except for two that co-eluted and were not added
to the calibration mixture) were examined in air particulate matter standard reference materials (SRMs), 1648a, 1649a, and
1649b as well as SRM 3067 toxaphene in methanol for assignment of reference values. SRM 3067 had mass fractions an order of
magnitude greater than the air particulate SRMs, which ranged from 0.568 ± 0.018 ng g−1 dry mass (B9-2006 in SRM 1648a) to 12.9 ± 0.20 ng g−1 dry mass (B9-715 (P 58) in SRM 1649a). The three air particulate SRMs all had different mass fractions and proportions of
congeners relative to the sum of the toxaphene congeners. SRM 3067 may be useful as a technical mixture toxaphene congener
calibrant. SRMs 1648a and 1649b will serve as reference materials for the analysis of 21 (three congeners were not included
due to values below the detection limit or a potential polychlorinated biphenyl co-elution) toxaphene congeners in atmospheric
particulate samples. |
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