Solid-phase microfibers based on polyethylene glycol modified single-walled carbon nanotubes for the determination of chlorinated organic carriers in textiles |
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Authors: | Zhang Wei-Ya Sun Yin Wang Cheng-Ming Wu Cai-Ying |
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Institution: | (1) Shenzhen Entry–Exit Inspection & Quarantine Bureau, Shenzhen, 518045, China;(2) College of Food Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China;(3) College of Chemistry and Molecular Science, Wuhan University, Wuhan, 430072, China; |
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Abstract: | Based on polyethylene glycol modified single-walled carbon nanotubes, a novel sol–gel fiber coating was prepared and applied
to the headspace microextraction of chlorinated organic carriers (COCs) in textiles by gas chromatography-electron capture
detection. The preparation of polyethylene glycol modified single-walled carbon nanotubes and the sol–gel fiber coating process
was stated and confirmed by infrared spectra, Raman spectroscopy, and scanning electron microscopy. Several parameters affecting
headspace microextraction, including extraction temperature, extraction time, salting-out effect, and desorption time, were
optimized by detecting 11 COCs in simulative sweat samples. Compared with the commercial solid-phase microextraction fibers,
the sol–gel polyethylene glycol modified single-walled carbon nanotubes fiber showed higher extraction efficiency, better
thermal stability, and longer life span. The method detection limits for COCs were in the range from 0.02 to 7.5 ng L−1 (S/N = 3). The linearity of the developed method varied from 0.001 to 50 μg L−1 for all analytes, with coefficients of correlation greater than 0.974. The developed method was successfully applied to the
analysis of trace COCs in textiles, the recoveries of the analytes indicated that the developed method was considerably useful
for the determination of COCs in ecological textile samples. |
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