Citation: CHEN Yi-Xin, FENG Qing-Sheng, WANG Xiao-Zhong, LI Lan-Jie, LI Xu-Wen, JIN Yong-Ri. Determination of Trzaine Herbicides in Panax Ginseng C.A.Mey by Silica Supported Ionic Liquid-Matrix Solid Phase Dispersion-Ultrasonic-Assisted Nebulization Extraction-Solid Phase Extraction Followed by High-Performance Liquid Chromatography[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(7): 1106-1111. doi: 10.11895/j.issn.0253-3820.160064
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A new ultrasonic-assisted nebulization extraction (UANE) method coupled with silica-supported ionic liquid-based matrix solid phase dispersion(S-SIL-based MSPD) and solid phase extraction(SPE) was established for the extraction of five triazine herbicides from root of Panax ginseng C.A.Mey. High performance liquid chromatography (HPLC) was used to determine these analytes. Experimental parameters, which affect the recoveries of the analytes, were studied and optimized. The sample powder (300 mg) was mixed with 150 mg of silica gel ([C6MIM] [PF6] 2.0 mmol/g). After MSPD for 5 min, the mixtures were extracted in water (pH 7, NaCl 1.0%) by UANE for 10 min, and then eluted by 5.0 mL of acetonitrile from the SPE column (C18, 300 mg). Under the optimized conditions, the LODs of these five triazine herbicides are in the ranges of 0.020-0.035 μg/g, the concentration range of linear relationship of analytes (r2≥0.9992) are in the ranges of 0.15-20.00 μg/g. The recoveries of these five triazine herbicides are in the ranges of 78.2%-95.2%, the RSDs are in the range of 3.5%-6.0%. The method shows a quick, efficient, high purifying effect and high extraction rate for the target analytes, and can be used to extract pesticide residues in traditional Chinese medicine.
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