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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Pena-Abaurrea, M. Ramos, J. J. Gonzalez, M. J. Ramos, L. |
| Description | Country affiliation: Spain Author Affiliation: Pena-Abaurrea M ( Department of Instrumental Analysis and Environmental Chemistry, IQOG, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain.) |
| Abstract | A new miniaturized pressurized liquid extraction (PLE) with in-cell purification method has been developed for the simultaneous extraction of endogenous prioritary and toxic polychlorinated biphenyls (PCBs) and environmentally relevant tri- to deca-brominated diphenyl ether (PBDE) congeners from different feed matrices. Parameters affecting the efficiency of the selective PLE process, such as sorbent:matrix ratio, volume and nature of the extraction solvent, PLE working mode, extraction time and temperature, and amount of co-sorbents, were optimized. n-Hexane and n-hexane:dichloromethane (1:1, v/v) were used as extraction solvents. 8-mL of organic solvents and 3.5 g of sorbents sufficed for complete sample treatment. Only 0.25 g of feed sample were required for accurate determination of the endogenous PCBs studied using gas chromatography with a micro-electron capture detector (GC-µECD) during method development, and for PBDE analysis using either GC-µECD or gas chromatography with negative chemical ionization-quadrupole mass spectrometry (GC-NCI-qMS). Gas chromatography coupled to ion trap detection working in tandem mode, GC-ITD (MS/MS), was used for final PCB confirmation. Additional purification of the sample extracts was not required. The performance of the complete PLE-based method was evaluated at two spiking levels, 0.4 and 4 ng/g wet weight. Recoveries in the range 60-120% were obtained for PCBs, while those of PBDEs ranged from 86% to 114% for most of the target analytes. The relative standard deviations were in general lower than 20%. The optimized procedure was applied to the determination of the investigated PCBs and PBDEs in a variety of feed samples. |
| ISSN | 00219673 |
| Volume Number | 1273 |
| e-ISSN | 18733778 |
| Journal | Journal of Chromatography A |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2013-01-18 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Animal Feed Analysis Halogenated Diphenyl Ethers Isolation & Purification Liquid-liquid Extraction Instrumentation Methods Miniaturization Polychlorinated Biphenyls Gas Chromatography-mass Spectrometry Pressure Reproducibility Of Results Tandem Mass Spectrometry Journal Article Research Support, Non-u.s. Gov't Discipline Analytical Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Medicine Analytical Chemistry Biochemistry |
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