›› 2011, Vol. 23 ›› Issue (6): 0-1181.

• 环境科学 •    

苯酰菌胺在黄瓜及土壤中的残留动态

张春荣,平立凤,赵华,何红梅,胡秀卿,吴珉,李振*

  

  1. 浙江省农业科学院 农产品质量标准研究所,浙江 杭州 310021
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-11-25 发布日期:2011-11-25

Residue dynamics of zoxamide in cucumber and soil

ZHANG Chunrong;PING Lifeng;ZHAO Hua;HE Hongmei;HU Xiouqing;WU Min;LI Zhen*   

  1. Institute of Quality and Standard for Agricultural Products,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-11-25 Published:2011-11-25

摘要:

建立了气相色谱(GC)分析黄瓜及土壤中苯酰菌胺残留的方法。样品经乙腈提取,碱性氧化铝柱净化后用气相色谱仪的电子捕获检测器(GC/ECD)检测。结果表明:苯酰菌胺在0.02~0.00 mg·L-1范围线性关系良好,相关系数为1;苯酰菌胺在黄瓜及土壤中的最低检出质量分数为0.1 mg·kg-1 ;黄瓜中苯酰菌胺的平均添加回收率为89.%~96.%,变异系数为4.%~10.%;土壤中苯酰菌胺的平均添加回收率为90.%~97.%,变异系数为2.%~4.5。苯酰菌胺在黄瓜及土壤中的消解动态符合一级动力学方程,在黄瓜中的消解半衰期为1.~3. d,土壤中的消解半衰期为1.~5. d。

关键词: 苯酰菌胺, 黄瓜, 土壤, 残留, 气相色谱法

Abstract:

A method was developed to determine the residue of zoxamide in cucumber and soil by gas chromatography(GC).The samples were extracted by acetonitrile, purified by column aluminaB and analyzed by gas chromatography with electron capture detection (GC/ECD). The results showed that the linear ranges were 0.020-0.000 mg·L-1 for zoxamide, the coefficient of correlation was 1 and the limit of quantitation (LOQ) of residues in cucumber and soil was 0.1 mg·kg-1.The average recoveries and coefficient of variations of zoxamide of the method varied from 89.% to 96.% and 4.% to 10.% for cucumber samples, and 90.% to 97.% and 2.% to 4.5 for soil samples.The degradation of zoxamide in cucumber and soil were conformed to the firstorder dynamic equation. The halflife of zoxamide in cucumber and soil were 1.-3. d and 1.-5. d,respectively.

Key words: zoxamide, cucumber, soil, residue, gas chromatography