质谱学报2011，Vol.32Issue(6)：341-349,9.
分散固相萃取-气相色谱-质谱联用法检测葱、韭菜和姜中多种农药残留
Determination of Pestiside Multi-Residues in Onion,Leek and Ginger by Dispersive Solid-Phase Extraction and GC/MS
陈健航 1叶瑜霏 1程雪梅 1李亮 1吴春梅1
作者信息
- 1. 东莞市农产品质量安全监督检测所,广东东莞523086
- 折叠
摘要
Abstract
A multi-residue analytical method was developed for the determination of 28 pesticide residues in onion, leek and ginger using gas chromatography-mass spectrometry (GC/MS). The samples were treated with microwave (500 W,90 s) before being crushed to make the allinase inactive and to eliminate the matrix effect. The pesticide residues were extracted from samples by acetonitrile, primary secondary amine (PSA) and C18 mixed adsorbents, which were used for purification at the same time to achieve quick, easy, cheap, effective, rugged and safe analysis. Internal standard substance-triphenyl phosphate (TPP) was used to overcome matrix effect and achieve quantitatively determination. The correlation coefficients are geater than 0. 995, and the limits of the detection are in the range of 0.1 - 20. 8 fig/kg. The method is validated at two fortification levels of 0. 05 mg/kg and 0.1 mg/kg in blank samples, phorate, omethoate and cyfluthrin cannot be quantitatively deter-mined in ginger due to interference. The averge recoveries are in the range of 70% -130% excepted for methmidopos, acephate and chlorothalonil that below 70%. The relative standard deviations(RSDs) are in the range of 0. 5 % - 20%.关键词
农药残留/气相色谱-质谱法/分散固相萃取/葱/韭菜/姜Key words
pesticide residues/ gas chromatography-mass spectrometry(GC/MS) / QuECh-ERS method/onion/leek/ ginger分类
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陈健航,叶瑜霏,程雪梅,李亮,吴春梅..分散固相萃取-气相色谱-质谱联用法检测葱、韭菜和姜中多种农药残留[J].质谱学报,2011,32(6):341-349,9.
