Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1457, Issue -, Pages 14-21Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2016.06.043
Keywords
Stir bar sorptive extraction; Pulse glow discharge-ion mobility spectrometry; Multiwalled carbon nanotubes; Triazine herbicides
Funding
- Fund for Fostering Talents in Basic Science of the National Natural Science Foundation of China [J1210064]
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An analytical method based on stir bar sorptive extraction (SBSE) coupled with pulse glow discharge-ion mobility spectrometry (PGD-IMS) was developed for analysis of three triazine pesticide residues in water and soil samples. An injection port with sealing device and stir bars hold device were designed and constructed to directly position the SBSE fiber including the extracted samples into the heating device, making desorption and detection of analytes proceeded simultaneously. The extraction conditions such as SBSE solid phase material, extraction time, extraction temperature, pH value and salt concentration were optimized. Mixture of MWCNTs-COOH and PDMS were shown to be effective in enriching the triazines. The LODs and LOQs of three triazines were found to be 0.006-0.015 mu g kg(-1) and 0.02-0.05 mu g kg(-1), and the linear range was 0.05-10 mu g L-1 with determination coefficients from 0.9987 to 0.9993. The SBSE-PGD-IMS method was environmentally friendly without organic solvent consumption in the entire experimental procedures, and it was demonstrated to be a commendable rapid analysis technique for analysis of triazine pesticide residues in environmental samples on site. The proposed method was applied for the analysis of real ground water, surface water and soil samples. (C) 2016 Elsevier B.V. All rights reserved.
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