Citation: LI Ya-Zhen, LI Zhao-Qian, ZHU Hua-Ling, WANG Wei-Ping. Determination of Triazine Pesticides in Water Samples by Capillary Electrophoresis Coupled with Solid Phase Extraction Based on Magnetic Graphene Nanocomposite[J]. Chinese Journal of Analytical Chemistry, ;2015, 43(12): 1882-1887. doi: 10.11895/j.issn.0253-3820.150426 shu

Determination of Triazine Pesticides in Water Samples by Capillary Electrophoresis Coupled with Solid Phase Extraction Based on Magnetic Graphene Nanocomposite

1.
College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China

Corresponding author: WANG Wei-Ping,
Received Date: 22 May 2015
Available Online: 23 July 2015
Fund Project: 本文系国家自然科学基金资助项目(No.21305128) (No.21305128)

In this study, magnetic solid-phase extraction(MSPE) combined with capillary electrophoresis was developed for the simultaneous determination of four triazine pesticides in aqueous solution. The obtained magnetic nanocomposite(graphene/Fe₃O₄, G/Fe₃O₄) as adsorbent for MSPE endowed the method with good enrichment for triazine pesticides. The MSPE conditions such as pH of sample solution, amount of adsorbent, extraction time and elutent were investigated. Under the optimal MSPE conditions including 20 mg of adsorbent(G/Fe₃O₄), 0.5 mL of acetone as eluent and 20 min of extraction time in pH 7.0 solution, good linearities were obtained for the analytes between peak area and concentration in the range of 5-500μg/L with correlation coefficients greater than 0.9909. Detection limits were less than 3.12μg/L. The relative standard deviations(RSDs) for both intra-and inter-day analysis(n=5) were in the range of 2.7%-12.7% and 7.7%-14.0%, respectively. The established method was applied to analyze the water samples(river water and tap water), and the mean recoveries of standard addition experiment were between 70.4% and 117.3% for all analytes(RSDs less than 11.5%).
- Magnetic graphene,
- Solid phase extraction,
- Capillary electrophoresis,
- Triazine pesticides
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沈阳化工大学材料科学与工程学院沈阳 110142