College of Food, Heilongjiang Bayi Agricultural University, Xinfeng Lu 5, Daqing 163319, PR China; College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
College of Food, Heilongjiang Bayi Agricultural University, Xinfeng Lu 5, Daqing 163319, PR China.
Food Chem. 2018 Apr 15;245:1190-1195. doi: 10.1016/j.foodchem.2017.11.029. Epub 2017 Nov 10.
Ionic liquid-based matrix solid phase dispersion-solvent flotation coupled with high performance liquid chromatography was developed for the determination of the acetanilide herbicides, including metazachlor, propanil, alachlor, propisochlor, pretilachlor, and butachlor in rice samples. Some experimental parameters, including the type of dispersant, the mass ratio of dispersant to sample, pH of sample solution, the type of extraction solvent, the type of ionic liquid, flotation time, and flow rate of N were optimized. The average recoveries of the acetanilide herbicides at spiked concentrations of 50, 125, and 250 µg/kg ranged from 89.4% to 108.7%, and relative standard deviations were equal to or lower than 7.1%, the limits of quantification were in the range of 38.0 to 84.7 µg/kg.
建立了一种基于离子液体的基质固相分散-溶剂浮选与高效液相色谱联用的方法，用于测定稻米样品中的乙酰苯胺类除草剂，包括甲草胺、丙草胺、异丙甲草胺、异丙草胺、甲草胺和丁草胺。优化了一些实验参数，包括分散剂的类型、分散剂与样品的质量比、样品溶液的 pH 值、萃取溶剂的类型、离子液体的类型、浮选时间和氮气的流速。在 50、125 和 250 µg/kg 加标浓度下，乙酰苯胺类除草剂的平均回收率为 89.4%至 108.7%，相对标准偏差等于或低于 7.1%，定量限为 38.0 至 84.7 µg/kg。
