Determination of PCBs, PCDDs and PCDFs in insulating oil samples from stored Chinese electrical capacitors by HRGC/HRMS |
| |
Authors: | Huang Jun Matsumura Toru Yu Gang Deng Shubo Yamauchi Makoto Yamazaki Norimasa Weber Roland |
| |
Institution: | a School of Environment, POPs Research Center, Tsinghua University, Beijing 100084, PR China b IDEA Consultants, Inc., Shizuoka 421-0212, Japan c CSD IDEA (Beijing) Institute of Environmental Innovation Co. Ltd., Beijing 100084, PR China d POPs Environmental Consulting, Ulmenstrasse 3, 73035 Göppingen, Germany |
| |
Abstract: | Homologue and congener profiles of polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) in commercial PCBs formulations are key information for the source identification of PCBs contamination as well as for the risk assessment caused by potential exposure. The isotope dilution technology in combination with high resolution gas chromatography-high resolution mass spectrometry (HRGC/HRMS) has made the accurate determination of such profiles possible. So far, various commercial PCB formulations except Chinese products have been successfully determined. Two PCBs containing insulating oil samples from stored Chinese electrical capacitors have been determined with the same methodology for comparability. The total concentration PCBs in two oil samples were 790 000 μg g−1 and 720 000 μg g−1, respectively. TriCBs, TetraCBs, and DiCBs were found to be most abundant. Concentration of dioxins contamination in two samples is 650-670 ngTEQ g−1, of which 69-71 ngTEQ g−1 from PCDD/Fs with the predominant congeners of 1,2,7,8-TeCDF; 2,3,7,8-TeCDF; 2,3,4,7,8-PeCDF and 1,2,3,7,8-PeCDF. The contributions of DL-PCBs in total TEQ in both samples were more than 85%. The dioxin-like toxicity in insulating oils contained in electrical capacitors could be considered receive attention as an important dioxins source if such wastes are not managed in an environmentally sound manner. |
| |
Keywords: | Polychlorinated biphenyls (PCBs) Polychlorinated dibenzo-p-dioxins (PCDDs) Polychlorinated dibenzofurans (PCDFs) Electrical capacitor |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|