期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1268, 期 -, 页码 9-15出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2012.10.035
关键词
Graphene; Solid-phase microextraction; Gas chromatography/electron capture detector (GC/ECD); Organochlorine pesticides (OCPs); Environmental water samples
资金
- National Basic Research Program of China (973 Program) [2012CB720600, 2012CB720601]
- National Natural Science Foundation of China [91017013, 31070327, 21005057, 21205091]
- Natural Science Fund for Creative Research Groups [20921062]
- Fundamental Research Funds for the Central Universities
In current study, a substrateless graphene fiber was successfully prepared by a simple hydrothermal strategy and used as solid-phase microextraction (SPME) sorbent. Five organochlorine pesticides (OCPs) were employed as model analytes to evaluate the performance of as-prepared graphene fiber. The results showed that the graphene fiber exhibited higher extraction efficiencies, higher thermal stability (up to 310 degrees C), better reproducibility, and longer service life (more than 180 times reuse) than commercial fibers. In addition, the method for the determination of OCPs was proposed by coupling headspace (HS)-SPME technique with gas chromatography/electron capture detector (HS-SPME-GC/ECD). The proposed HS-SPME-GC/ECD method showed low limits of detection (0.83-11.5 ng/L), wide linear dynamic ranges (more than 2 orders of magnitude), and acceptable reproducibility (RSD<10.9%). Finally, the proposed method was successfully applied to the analysis of OCPs in environmental water samples with good recoveries (81-121%) and satisfactory precisions (RSD< 9%). (C) 2012 Elsevier B.V. All rights reserved.
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