Enrichment of polychlorinated biphenyls in river water by using magnetic adsorbents with high selectivity to nonplanar aromatic compounds and their analysis with gas chromatography–mass spectrometry. Issue 9 (14th June 2021)

• Record Type: Journal Article
• Authors: Wang, Xuesong; Li, Chunyan; Wu, Dan; Shen, Jiwei; Wei, Yinmao; Wang, Chaozhan
• Is Part Of: Journal of the Chinese Chemical Society. Volume 68:Issue 9(2021)
• Page Start: 1731
• Page End: 1738
• Publication Date: 2021-06-14
• Subjects: enrichment -- gas chromatography–mass spectrometry -- magnetic adsorbent -- nonplanar compounds -- polychlorinated biphenyls; Chemistry -- Periodicals; Electronic journals; 540.5
• DOI: 10.1002/jccs.202100102
• Languages: English
• ISSNs: 0009-4536

Abstract

Abstract: Previously our group reported a magnetic adsorbent, magGO@bottlebrush, which has high selectivity to nonplanar aromatic compounds with two or more phenyl rings. In this work, the magGO@bottlebrush was used for pre‐concentration of seven frequently concerned polychlorinated biphenyls (PCB28, PCB52, PCB101, PCB118, PCB138, PCB153, and PCB180) from river water samples, considering PCBs are hydrophobic compounds with two substituted benzene rings and have nonplanar structure, and gas chromatography–mass spectrometry (GC–MS) was used for the quantification. Several parameters affecting the extraction efficiency of the seven PCBs were investigated, under the best concerned extraction conditions, the developed method had excellent linearity ( R 2 > 0.9951) within the range of 1–100 pg/ml, it also possessed low limits of detection (0.33–0.90 pg/ml, S / N = 3) for the PCBs. Then, the enrichment and detection methods were applied to determine PCBs in two local rivers. PCB101, PCB118, and PCB138 were detected in one river, and their concentrations were 1.31, 0.69, and 10.01 pg/ml, respectively. The spiked recoveries of the river water samples were 63.33–119.29%, and the relative SD values were less than 17.33%. These results show that the proposed method has great potential application for the analysis of PCBs in river water samples. Abstract : Polychlorinated biphenyls (PCBs) in river water were enriched by magnetic solid‐phase extraction using adsorbents with high selectivity to nonplanar aromatic compounds, and the enriched PCBs were then analyzed by using gas chromatography–mass spectrometry.