Methodological refinements in the determination of 146 polychlorinated biphenyls, including non-ortho- and mono-ortho-substituted PCBs, and 26 organochlorine pesticides as demonstrated in heron eggs
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Abstract
A method for the determination of 146 polychlorinated biphenyls (PCBs), including four non-ortho- and eight mono-ortho-substituted congeners, and 26 chlorinated pesticides is described. The method consists of ultrasonic extraction, Florisil cleanup, HPLC fractionation over porous graphitic carbon (PGC), and final determination with GC/ECD, GC/MS, or both. Two PCB congeners (PCB 30 and PCB 161) and two polybromobiphenyls (2,4‘,5-tribromobiphenyl and 3,3‘,4,4‘-tetrabromobiphenyl) were used as surrogate standards to evaluate the analytical efficiency. Four PCB congeners, PCB 14 and PCB 159 for the first fraction, PCB 61 for the second fraction, and PCB 204 for the third fraction, were used as internal standards to monitor the GC performance. The retention behavior of PCBs and pesticides on the PGC column are discussed. The method was found to be reproducible, effective, and reliable under the operational conditions proposed and was applied successfully to the analysis of individual PCBs and chlorinated pesticides in black-crowned night heron (Nycticorax nycticorax) egg samples.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Methodological refinements in the determination of 146 polychlorinated biphenyls, including non-ortho- and mono-ortho-substituted PCBs, and 26 organochlorine pesticides as demonstrated in heron eggs |
| Series title | Analytical Chemistry |
| DOI | 10.1021/ac0205560 |
| Volume | 75 |
| Issue | 5 |
| Year Published | 2003 |
| Language | English |
| Publisher | American Chemical Society |
| Contributing office(s) | Patuxent Wildlife Research Center |
| Description | 9 p. |
| First page | 1058 |
| Last page | 1066 |
| Country | United States |
| State | Maryland |
| Other Geospatial | Baltimore Harbor, Chesapeake Bay, Holland Island |
| Google Analytic Metrics | Metrics page |