The estimation of polychlorobiphenyls

Collins, G.B.; Holmes, Darrell; Jackson, F. J.

doi:10.1016/s0021-9673(01)91897-7

Cited by 22 publications

(6 citation statements)

References 10 publications

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“…DDT and TDE may be dehydrochlorinated to their respective olefins and similarly separated along with DDE (8,71,72). This technique has not received as much application as the chromatographic procedures, probably because pesticides and lower chlorinated biphenyls are destroyed or changed, preventing their determination.…”

Section: Determination Of Pcb Residuesmentioning

confidence: 99%

Chemistry of PCBs and PBBs

Pomerantz¹,

Burke²,

Firestone³

et al. 1978

Environ Health Perspect

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Section: Determination Of Pcb Residuesmentioning

confidence: 99%

Chemistry of PCBs and PBBs

Pomerantz¹,

Burke²,

Firestone³

et al. 1978

Environ Health Perspect

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“…Oxidized p,p-DDE has a retention time of about 5.5 min, the same as that exhibited by the p,p-DCBP standard. Since the conversion of p,p-DDE to p,p-DCBP is essentially complete, and since the absorbance of the two substances was found to be approximately the same, a semiquantitative determination of the residue level of p,p-DDE could be obtained from peak area comparisons of oxidized p,p-DDE with p,p-DCBP standards of known concentrations (Collins et at, 1972;Miles 1972). PCB's are unaffected by this oxidation procedure, and continue to exhibit a retention time of about 2.1…”

Section: Resultsmentioning

confidence: 99%

“…This occurs because the PCB's have similar retention times to the insecticides (Sherma, 1981 Young & Burke, 1972). DCBP exhibits a retention time different from PCB's in both GC and HPLC, and a different migration distance in TLC (Mulhern et aI., 1971;Collins et al, 1972). These authors demonstrated the use of this technique in the determination of PCB's and DDE in wildlife samples.…”

mentioning

confidence: 98%

“…Chiosi et al (1982) did exactly this to determine the amounts of PCB's and DDE in snails and tuna from the Mediterranean Sea. These authors were able to skip the Florisil cleanup step by performing the oxidation for 15 hours at 80 0 C, rather than for the usual 20 minutes at 950C (Collins et al, 1972;Miles, 1972 (Reynolds, 1969;Calambokidis et al, 1984;Osselton & Snelling, 1986). This eluate could then be subjected to chromium trioxide oxidation, followed by injection into an HPLC system.…”

mentioning

confidence: 99%

“…It has been demonstrated that both PCB's and p,p-DDE can be detected with HPLC, although the PCB mixture overlaps the p,p-DDE (Brinkman et al, 1976a). By adding an oxidation step which converts p,p-DDE to p,p-DCBP (dichlorobenzophenone), good group separation with HPLC occurs and can be utilized to determine the presence and levels of these two organochlorines (Collins et al, 1972;Sherma, 1981). Following this reasoning, a method using HPLC was developed to screen blubber samples of stranded marine mammals for PCB's and p,p-DDE in order to get an indication of the current organochlorine levels in these species.…”

mentioning

confidence: 99%

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A Semiquantitative Analysis of PCB and P,P-DDE Residues in Stranded Marine Mammals Using High Performance Liquid Chromatography

Hayteas¹

2000

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Dr. Dennis Barnum, who all reviewed my dissertation draft, and made helpful comments during the defense. My fellow graduate students, Leslie Parr and Richard Rausch, provided support and sympathy throughout these last five years, as did my good friend, Lynn Larson, who also provided immeasurable assistance in securing supplies and employment. Thirdly, I want to dedicate this dissertation to my wife, Victoria, who was at my side during the entire time it took for this project to be finished. She never doubted that it would be a success; I could never have done it without her. Finally, I wish to remember my dog, Skoshi. a constant companion during most of this doctoral project, but who, sadly, did not live to see the final product.

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Polychlorinated Biphenyls Analysis in Environmental Samples

Bavel

Tysklind

Lindström

2000

Encyclopedia of Analytical Chemistry

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The analysis of polychlorinated biphenyls (PCBs) in a wide variety of environmental samples is discussed, starting with the more traditional methodology and moving on to more recent developments that are expected to continue in the twenty‐first century. Several detection techniques, including gas chromatography (GC) coupled with electron capture detection (ECD) and mass spectrometry (MS), are described in the first part of this article. The use of MS as a detection technique is discussed in detail, from both a qualitative and a quantitative point of view. To a large extent the detection technique used determines the sample pretreatment and clean‐up, and in later paragraphs column clean‐up on adsorbents is discussed, including fat removal, alumina column chromatography and planar separation on carbon. A new methodology for the analysis of PCBs in environmental samples is also described. Both speed of analysis using gas chromatography/time‐of‐flight mass spectrometry (GC/TOFMS) and environmentally friendly analysis using supercritical CO 2 are discussed in detail. In the last section several aspects of quality assurance/quality control (QA/QC) are discussed using an international intercalibration study as an example.

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The estimation of polychlorobiphenyls

Cited by 22 publications

References 10 publications

Chemistry of PCBs and PBBs

Chemistry of PCBs and PBBs

A Semiquantitative Analysis of PCB and P,P-DDE Residues in Stranded Marine Mammals Using High Performance Liquid Chromatography

Polychlorinated Biphenyls Analysis in Environmental Samples

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