Separation of polychlorodibenzo-p-dioxins and-dibenzofurans on the new polar stationary phase DB DIOXIN

Bacher, R.; Ballschmiter, Karlheinz

doi:10.1007/bf02276126

Cited by 19 publications

(4 citation statements)

References 5 publications

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“…Isomer specific elution patterns of these compounds are well established for widely used columns [13,14,15]. A few studies were published regarding the PBDE elution pattern [16].…”

Section: Resultsmentioning

confidence: 99%

Potential chlorinated and brominated interferences on the polybrominated diphenyl ether determinations by gas chromatography–mass spectrometry

Eljarrat

Cal

Barceló

2003

Journal of Chromatography A

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“…Isomer specific elution patterns of these compounds are well established for widely used columns [13,14,15]. A few studies were published regarding the PBDE elution pattern [16].…”

Section: Resultsmentioning

confidence: 99%

Potential chlorinated and brominated interferences on the polybrominated diphenyl ether determinations by gas chromatography–mass spectrometry

Eljarrat

Cal

Barceló

2003

Journal of Chromatography A

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“…The two indices are defined as and The formulation of the indices implies that the concentration of pure 2,3,7,8-substituted congeners is known. However, because all analyses have used DB-5 columns, concentrations determined for 2,3,4,7,8-PnCDF are subject to interferences from coeluting non-2,3,7,8-substituted congeners (42). Representative samples analyzed using both DB-5 and DB-DIOXIN columns (42) have indices that differ only in the third or fourth decimal place from those obtained using a DB-5 column alone (Supporting Information Table 2).…”

Section: Resultsmentioning

confidence: 99%

“…However, because all analyses have used DB-5 columns, concentrations determined for 2,3,4,7,8-PnCDF are subject to interferences from coeluting non-2,3,7,8-substituted congeners (42). Representative samples analyzed using both DB-5 and DB-DIOXIN columns (42) have indices that differ only in the third or fourth decimal place from those obtained using a DB-5 column alone (Supporting Information Table 2). These small differences indicate that coeluting non-2,3,7,8 congeners provide negligible interference for either the PCA models or the two indices.…”

Section: Resultsmentioning

confidence: 99%

Assessment of Chlorinated Dibenzo-p-dioxin and Dibenzofuran Trends in Sediment and Crab Hepatopancreas from Pulp Mill and Harbor Sites Using Multivariate- and Index-Based Approaches

Yunker¹,

Cretney²,

Ikonomou³

2002

Environ. Sci. Technol.

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Mill process changes and source controls instituted in the late 1980s at pulp and paper mills along the British Columbia (BC) coast produced dramatic reductions in both the concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and the TEQ (2,3,7,8-TCDD toxic equivalents). Nevertheless, questions remained as to whether the sediments were acting as contaminant sources or sinks, whether crab uptake pathways have stayed the same since the mills ceased producing PCDD/Fs, and whether improvement was faster at some sites than others. To examine the processes governing the changes in PCDD/F composition, PCDD/F sources and compositional trends for the coastal BC sites were interpreted using sediment and crab PCA (principal components analysis) models and two indices based on the three main groups of PCDD/Fs that covary in all PCA models. One index measured the relative inputs of chlorine bleaching PCDFs and PCP (pentachlorophenol)-related PCDDs at each mill and harbor site whereas the other measured the relative inputs of PCP wood preservatives and pulp mill effluents. Results indicated that PCDFs produced during chlorine bleaching accumulate from sediments to crabs more readily than the PCDDs but that the chlorine bleaching TCDFs have generally decreased in importance at all mill sites. In the years just before 1995, little change was observed in either the proportion of toxic 2,3,7,8-chlorinated congeners or the PCDD/F concentrations, and the improvements seemed to have largely ceased by 1995. The lack of change in PCA composition for the harbors provided a further, disturbing indication that ecosystem recovery may have stalled. Results also implied that the main route of PCDD/Fs into crabs shifted from uptake via a pelagic food web incorporating effluent-borne PCDD/Fs associated with suspended particulate matter to uptake via a benthic food web.

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“…The development of capillary columns in HRGC permits the congener‐specific determination of a number of these mixtures. The isomer‐specific elution pattern of PCDDs and PCDFs is well established for such widely used columns as DB‐5/DB‐5ms (methyl–5% phenyl‐polysiloxane), DB‐Dioxin (44% methyl–28% phenyl–20% cyanopropyl‐polysiloxane with 8% polyoxyethylene), Sil 88/SP 2331 (100% cyanopropyl‐polysiloxane) 14–16. Analogous studies have been reported on the chromatographic separation of PCB congeners using different columns such as DB‐517 or SGE HT8 18.…”

Section: Chromatographic Separationmentioning

confidence: 92%

Congener‐specific determination of dioxins and related compounds by gas chromatography coupled to LRMS, HRMS, MS/MS and TOFMS

Eljarrat

Barceló

2002

J. Mass Spectrom.

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Their characteristics as persistent organic pollutant and their toxicity (2,3,7,8-TCDD is named as a known human carcinogen) make the dioxins and related compounds a focus of interest in environmental analytical chemistry. In view of the widespread distribution of dioxins in the environment, these compounds must be monitored in several matrices, such as air, effluents, soil, sludge and biological samples. The analytical methodologies are especially difficult owing to the complexity of the mixtures of congeners (210 PCDD/Fs and 209 PCBs) and to the low detection limits required (ppb to ppq). Moreover, time-consuming sample preparation steps are needed owing to the presence of a large number of interfering compounds. The different toxicity of each congener requires the development of congener specific methods. This review of trace dioxin determination by mass spectrometry (MS) includes sample preparation and chromatographic separation. In this Special Feature, the use of different MS techniques such as low-resolution MS (LRMS) and high-resolution MS (HRMS) is discussed in terms of selectivity and sensitivity. The performances of other MS techniques, such as tandem MS (MS/MS) and time-of-flight MS (ToFMS), are compared. Quantification techniques, especially the isotopic dilution method, are also discussed. Conclusions and future perspectives are outlined.

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Separation of polychlorodibenzo-p-dioxins and-dibenzofurans on the new polar stationary phase DB DIOXIN

Cited by 19 publications

References 5 publications

Potential chlorinated and brominated interferences on the polybrominated diphenyl ether determinations by gas chromatography–mass spectrometry

Potential chlorinated and brominated interferences on the polybrominated diphenyl ether determinations by gas chromatography–mass spectrometry

Assessment of Chlorinated Dibenzo-p-dioxin and Dibenzofuran Trends in Sediment and Crab Hepatopancreas from Pulp Mill and Harbor Sites Using Multivariate- and Index-Based Approaches

Congener‐specific determination of dioxins and related compounds by gas chromatography coupled to LRMS, HRMS, MS/MS and TOFMS

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