摘要
建立了蔬菜中克螨特残留量气相色谱测定方法.以石油醚/丙酮(1:1)或正己烷/丙酮(1:1)混合溶剂为提取剂.振荡萃取,通过液-液分配除去提取剂中的水溶性杂质和水分,并以弗罗里硅土层析柱去除提取液中的有机杂质.正己烷/乙酸乙酯(95:5)或正己烷/丙酮(95:5)洗脱剂洗脱克螨特.用GCFPD(配S滤光片)测定克螨特残留量,色谱柱采用“农残Ⅱ”毛细管柱。结果表明,蔬菜样品中的克螨特平均添加回收率为88.5%-108.1%.相对标准偏差(RSD)为3.14%~9.54%,最小检测量为0.1ng.检出限为0.01mg·kg^-1。该方法简便、准确、能满足实际样品分析。
A method for determining propargite residue in vegetables was established by gas chromatography. The vegetable samples were treated with petroleum ether/acetone (1 : 1) or n-hexane/acetone (1 : 1). then extracted by agitation, the water-soluble impurities in the extract were removed by llquid-liquid partitioning method, the or ganic impurities were removed with florisil chromatography, then the detergent of n-hexane/ethyl acetate (95 : 5) or n-hexane/acetone (95 : 5) was used to elute proparglte. Propargite was determined by GC - FPD (with S optical lamella), separated by “Pesticide Residuaes Ⅱ” capillary column. The results showed that the average recovery of propargite ranged from 88. 5 % ~ 108.1%, and RSD 0. 01 mg · kg^-1 in vegetable samples. This method is pies. ranged from 3.14%-9.54%, MDQ was 0. 1 ng, LOD was simple, accuratc, and it can satisfy the analysis of reality samples.
出处
《福建农业学报》
CAS
2006年第4期407-410,共4页
Fujian Journal of Agricultural Sciences
基金
漳州市科技计划项目(Z03028)
关键词
蔬菜
克螨特
残留
测定
气相色谱法
vegetables
propargite
residue
determination
Gas chromatography