Format:
Online-Ressource
ISSN:
1521-4168
Content:
Abstract: Three HRGC systems (1: 30m DB‐XLB capillary with MS‐SIM detection; 2: 60m DB‐XLB capillary with full‐scan, ion‐trap MS detection; and 3: Parallel dual‐column DB‐17 and series‐coupled HP5/HT5 with ECD detection) were used to completely characterize multiple lots of 8 different‐numbered Aroclor mixtures by quantitative calibration against 9 solutions containing primary standards of all 209 PCB congeners. Despite lower absolute sensitivity and more Aroclor congener coelutions than the dual‐column ECD system, the MS systems enabled measurement of more congeners per Aroclor since their greater linear response range did not require dilution of samples and standards. Pairs of different lots of Aroclors 1248 and 1254 displayed markedly different proportions of congeners, and the 1254 pair displayed strong differences in the extent of ortho‐chlorine substitution. The tables of congener weight percent distributions among Aroclors are more comprehensive and quantitatively precise than those of prior publications. However, the limitations of single‐level calibration precluded measurement of all congeners to the ±10% accuracy desirable for establishing these Aroclors as secondary standards for comprehensive, quantitative congener‐specific PCB analysis.
In:
volume:19
In:
number:12
In:
year:2005
In:
pages:657-668
In:
extent:12
In:
Journal of high resolution chromatography, Weinheim : Wiley-VCH, 1978-2000, 19, Heft 12 (2005), 657-668 (gesamt 12), 1521-4168
Language:
English
DOI:
10.1002/jhrc.1240191202
URN:
urn:nbn:de:101:1-2023112909331387805610
URL:
https://doi.org/10.1002/jhrc.1240191202
URL:
https://nbn-resolving.org/urn:nbn:de:101:1-2023112909331387805610
URL:
https://d-nb.info/1311565663/34
URL:
https://doi.org/10.1002/jhrc.1240191202
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