期刊
JOURNAL OF SEPARATION SCIENCE
卷 42, 期 10, 页码 1878-1885出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201801280
关键词
molybdenum oxide; nanobelts; polycyclic aromatic hydrocarbons; selective extraction; solid-phase microextraction
资金
- National Natural Science Foundation of China [21665014]
A bonding method was developed for coating molybdenum oxides onto a steel wire substrate, which was used as a solid-phase microextraction fiber, was coupled with gas chromatography. Based on the characterization, it is found that the as-prepared molybdenum oxides material contained a nanobelt structure with a uniform size and good dispersibility. In addition, there were a large number of small protrusions on the surface of the nanobelts. These characteristics provided a large specific surface area for extraction. Molybdenum oxides exhibited a high extraction selectivity for polycyclic aromatic hydrocarbons owing to its moderate coordination. After the optimization of the factors, method detection limits of < 1.25 mu g/L were achieved, and the calibration curves were linear within the range of 2-600 mu g/L. In addition, repeatability was demonstrated, and the relative standard deviation < 6.4%. The molybdenum oxides coating had a high scratch resistance, which could effectively prevent coating wear and failure. Combined with the high thermal and chemical stability, the service life of the coating was improved and could be used 150 times without a significant reduction in the extraction performance. Finally, the as-prepared fiber had a comparable extraction capacity and higher partition coefficients that those of commercial polyacrylate fibers.
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