GC/ECD法测定土壤中残留的酰胺类除草剂  

The GC/ECD method for detecting acetanilide herbicide residues in soil samples

作　　者：陈虹[1] 韩勇[1] 钟明[1] 靳伟[1] 王曦[1] 倪俊[1] 

机构地区：[1]中国科学院南京土壤研究所土壤与环境分析测试中心,江苏南京210008

出　　处：《化学试剂》2010年第12期1103-1107,共5页Chemical Reagents

基　　金：中国科学院南京土壤研究所基金支撑课题资助项目(20752010028)

摘　　要：采用振荡萃取、气相色谱/电子捕获检测法（GC/ECD）对土壤样品中的几种酰胺类除草剂进行了残留量检测。并对实验过程中涉及的一系列条件进行了优化,结果表明：选择丙酮（mL）∶土（g）=10~5∶1,180 r/min下振荡40 min后,过滤（分取或全转移）、浓缩至3 mL左右、再用N2吹至近干用正己烷定容,在GC/ECD上测定,测定结果良好,符合有机分析要求（回收率在80%~120%之间）。各目标物在GC/ECD上的检出限为0.002~0.092 mg/L不等。Several kinds of acetanilide herbicides in the soil sample were extracted by a to-and-fro oscillation machine and were then identified by GC/ECD（gas chromatography/electron capture detector）.Correlative conditions for the test were optimized in the course of experimentation.The results showed that the proposed GC/ECD was an appropriate method to detect acetanilide herbicide residues in the soil sample at a ratio of acetone（mL） to soil（g） equating to 10～5.Then the taper（with the mixture in it） was fixed on the to-and-fro oscillation machine and oscillated at a revolution rate of 180 rpm for 40 minutes to extract acetanilide herbicides.Subsequently the mixture was filtered and the solution（a part or all of the solution） was concentrated to about 3 mL and was purged with nitrogen until dryness.Finally the residue was dissolved in a constant volume of hexane prior to analyses by GC/ECD.The detection limits of these acetanilide herbicides by GC/ECD varied from 0.002 mg/L to 0.092 mg/L.

关 键 词：土壤 酰胺类除草剂 残留 检测 

分 类 号：O657.7[理学—分析化学]