Determination of pyrethroid pesticide residues in vegetables by pressurized capillary electrochromatography.
Determination of pyrethroid pesticide residues in vegetables by pressurized capillary electrochromatography.
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DOI：
10.1016/j.talanta.2005.09.006
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发表时间：
2006-03
期刊：
影响因子：
6.1
通讯作者：
Fanggui Ye;Zeng-hong Xie;Xiaoping Wu;Xucong Lin
中科院分区：
文献类型：
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作者：
Fanggui Ye;Zeng-hong Xie;Xiaoping Wu;Xucong Lin
建立了一种简便、快速的等度毛细管电色谱法（pCEC），用于6种拟除虫菊酯类农药的分离。考察了缓冲液pH值、有机溶剂含量、缓冲液浓度、外加电压等因素对6种拟除虫菊酯类农药分离的影响。在优化的条件下，所开发的pCEC方法允许基线分离的复杂混合物的6个拟除虫菊酯在<20分钟。将该方法应用于大白菜中上述农药残留的分析。定量限（LOQ）为0.5 ~ 0.8μg/ml（相当于蔬菜样品中0.05和0.08mg/kg），相对标准偏差（R.S.D.）<5.0%。6种拟除虫菊酯的平均回收率分别为89.6%~ 96.3%。
A simple and rapid pressurized isocratic capillary electrochromatography (pCEC) method has been developed to separate six pyrethroid pesticides. The effects of pH of buffer, organic solvent content, buffer concentrations and applied voltage on the separation of six pyrethroids were investigated. Under the optimized conditions, the pCEC method developed allows baseline separation of a complex mixture of six pyrethroids in <20min. The method is applied to the analysis of these pesticide residues in Chinese cabbage. The limits of quantification (LOQ) ranged from 0.5 to 0.8μg/ml (corresponding to 0.05 and 0.08mg/kg in the vegetable sample), with relative standard deviations (R.S.D.) <5.0%. Mean values of recoveries for six pyrethroids ranged from 89.6 to 96.3%, respectively.