毛细管气相色谱法测定莴苣中土壤杀菌剂土壤散残留  

Determination of soil fungicide quintozene in lettuce by capillary gas chromatography

作　　者：邬晨阳[1] 马建明[1] 赵立达[1] 

机构地区：[1]浙江省慈溪市疾病预防控制中心,浙江慈溪315300

出　　处：《中国卫生检验杂志》2009年第10期2254-2255,共2页Chinese Journal of Health Laboratory Technology

摘　　要：目的：建立莴苣中土壤杀菌剂土壤散残留的毛细管气相色谱分析方法。方法：莴苣样品用丙酮/正己烷（10：90,v/v）均质提取,用浓硫酸净化,采用DB-5毛细管柱（30 m×0.32 mm×0.25μm）分离,电子捕获检测器检测。结果：本方法测定莴苣中土壤散,在5-150 ng/ml浓度范围内,线性回归方程Y=252.4X-37.1,相关系数r=0.9992,线性回归良好;回收率87.5%-91.2%,相对标准偏差小于5.3%,该方法的检出限为0.5μg/kg。结论：本方法简便、快速、灵敏,同时具有良好的回收率和重现性。Objective：To develop a sensitive method for the determination of soil fungicide quintozene residue in lettuce by capillary gas chromatography. Methods：After the sample was extracted with acetone/hexane （10：90, v/v） and cleaned up with H2SO4 , the chromatographic separation was performed on a DB -5 capillary column （30 m × 0. 32 mm× 0. 25 μm） and detection was carried out by a micro electron capture detector. Results：The linear range was 5.0 - 150. 0 ng/ml and the limit of quantification was 0. 5 μg/kg for quintozene. The regression equation was Y = 252. 4X - 37. 1 with a coefficient of determination （ r = 0. 9992）. The extraction recoveries were between 87.5% - 91.2% , the RSD was less than 5.3%. Conclusion：This method is simple, rapid and sensitive with satisfactory recoveries and reproducibility.

关 键 词：毛细管气相色谱法 莴苣 土壤散 残留测定 

分 类 号：O657.71[理学—分析化学]