Determination of pyrethroid pesticides in tomato using ionic liquid-based dispersive liquid-liquid microextraction.
Determination of pyrethroid pesticides in tomato using ionic liquid-based dispersive liquid-liquid microextraction.
复制标题
采用离子液体分散液-液微萃取法测定番茄中的拟除虫菊酯类农药。
DOI：
10.1093/chromsci/bmt017
复制
发表时间：
2014
影响因子：
1.3
通讯作者：
K. Row
中科院分区：
文献类型：
--
作者：
Dandan Han;Baokun Tang;K. Row
建立了离子液体分散液液微萃取法对番茄样品中拟除虫菊酯类农药残留的灵敏测定方法。以疏水离子液体（1-丁基-3-甲基咪唑六氟磷酸）和乙腈分别作为萃取溶剂和分散溶剂。考察了影响萃取效率的实验参数：萃取溶剂的种类和体积、分散溶剂的种类和体积、样品溶液的pH和离子强度。在最佳提取条件下，提取回收率为83.9% ~ 96.7%。氯氰菊酯、甲氰菊酯和氯氟氰菊酯的富集因子分别为42、48和45。浓度为0.05 ~ 1.5µg/kg时，校正曲线呈线性关系，相关系数为0.9997 ~ 0.9999。相对标准偏差（n = 5）为1.7 ~ 4.5%。氯氰菊酯、甲氰菊酯和氯氟氰菊酯的检出限分别为8.1、9.9和14.3µg/kg。
A sensitive determination method was developed for the analysis of pyrethroid pesticide residues in tomato samples using ionic liquid-based dispersive liquid-liquid microextraction. A hydrophobic ionic liquid (1-butyl-3-methylimidazolium hexafluorophosphate) and acetonitrile were used as the extraction solvent and dispersive solvent, respectively. The following experimental parameters affecting the extraction efficiency were examined: types of extraction solvent and volume of extraction solvent, types of dispersive solvent and volume of dispersive solvent and pH and ion strength of the sample solution. Under the optimum conditions, the extraction recoveries ranged from 83.9 to 96.7%. Moreover, the enrichment factors for esbiothrin, fenpropathrin and cyhalothrin were 42, 48 and 45, respectively. The calibration curves were linear with correlation coefficients ranging from 0.9997 to 0.9999 at concentrations of 0.05-1.5 µg/kg. The relative standard deviation (n = 5) was 1.7-4.5%. The limits of detection for esbiothrin, fenpropathrin and cyhalothrin were 8.1, 9.9 and 14.3 µg/kg, respectively.