Characterization of commercial Aroclors by automated mass spectrometric determination of polychlorinated biphenyls by level of chlorination

Abstract

16) Wagman, D. D.; Evans, W. H.; Parker, V. B.; Schumm, R. H.; Halow, I.; Balley, S. M.; Churney, K. L.; Nuttall, R. L. Unger, S. E.; Vlntze, A.; Cooks, R. G.; Keough, T. J . Am. Chem. Soc. 1982. 104. 1507. A' Int' J ' 147-159. Inchaouh, J.; Blais, J. C:; Bolbach, B.; Brunot, A. Znt. J . Mass Spectrom. Ion Processes 1984, 6 1 , 153. Sunner, J. A.: Kulatunga, R.; Kebarle, P. Anal. Chem. 1986, 5 8 , 1312-1316.Michl, J. I n t . PCBs were not specifically identified, this GC/MS approach provided other valuable information, including the relative retention time, relative abundance, and level of chlorination of the congener(s) represented by each GC peak. Acquired data were used to identify and measure Aroclors in two solutions, one containing four Aroclor mixtures and one containing seven Aroclor mixtures. EXPERIMENTAL SECTION Materials.The nine PCB calibration congeners were obtained from Ultra Scientific, Hope, RI, and were used without purification. The internal standard, chrysene-d,,, was obtained from Aldrich Chemical Co., Milwaukee, WI. A single-component solution of each of the nine PCB concentration calibration congeners This article not subject to US.

Stable Chlorine Isotopic Compositions of Aroclors and Aroclor-Contaminated Sediments

“…The Clophens and Phenoclor DP-6 were donated by Dr. Jan Boon of The Netherlands Institute for Sea Research.b The estimated precision for δ 37 Cl measurements is 0.13‰. c Calculated from the average molecular distribution of mono-, di-, tri-, and tetrachloro congeners in Aroclor 1016 from(11).…”

Multilaboratory study of automated determinations of polychlorinated biphenyls and chlorinated pesticides in water, soil, and sediment by gas chromatography/mass spectrometry

“…These pesticides had been selected to serve as SCs (i.e., to provide an indication of method performance with every extract analyzed), and their performance in water samples analyzed in the authors' laboratory was reported previously (4). In this study, although all water aliquots were fortified with the same quantities of SCs, mean measured SC concentrations were lower in blanks (67 % for DDT-13C12 and 74% for BHC-13C6) than in water samples fortified with pesticides and PCBs (Table I).…”

“…Analytical procedures for determination of PCBs and those chlorinated pesticides in water are provided in U.S. Environmental Protection Agency (U.S. EPA) Method 680 (3), which allows either nonautomated determinations with conventional computer-assisted data interpretation or automated determinations with the special software. A previous report (4) described singlelaboratory accuracy and precision of results obtained when method 680 procedures with automated determinations were used to analyze water samples fortified with chlorinated pesticides and a variety of PCBs (as mixtures of Aroclor formulations). This paper documents results obtained when six other laboratories used the same proce-dures to analyze two fortified water samples.…”

“…An aliquot of a solution containing both ISs was added to each CAL and to each sample and blank extract. Details of calibration solution composition have been described previously (4).…”