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| 小麦田土壤中炔草酯GC-ECD检测方法研究及残留行为特征 |
| Detection Method and Residual Behavior of Clodinafop-propargyl by GC-ECD in Wheat Soil |
| 投稿时间：2014-04-01 |
| DOI：10.13254/j.jare.2014.0079 |
| 中文关键词: GC-ECD 土壤 炔草酯 残留 消解动态 |
| 英文关键词: GC-ECD soil clodinafop-propargyl residue degradation dynamic |
| 基金项目:农业部农药残留试验资助项目(2011H149) |
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| 中文摘要: |
| 采用乙腈振荡提取,GC-ECD测定,建立了小麦田土壤中炔草酯残留量的测定方法。在0.01～2.0 mg·kg-1质量浓度范围内,气相色谱峰面积与炔草酯质量浓度呈良好的线性关系,相关系数为R2=0.9994。外标法定量,土壤中添加炔草酯质量分数分别为0.01、0.1 mg·kg-1和0.5 mg·kg-1,平均回收率分别为95.91%、89.50%和75.35%,相对标准偏差分别为2.66%、7.64%和4.23%,最低检出浓度为0.01mg·kg-1。检测结果表明,该测定方法前处理简便快速、成本低、结果准确,能够满足土壤中炔草酯残留量的分析要求。在山东和湖南开展的2年两地土壤田间试验结果表明,炔草酯在土壤中30 d的消解率均超过99%,理论半衰期为2.7～3.9d,属于易降解农药。 |
| 英文摘要: |
| GC-ECD method was developed for the determination of clodinafop-propargyl in wheat soil.The soil samples were extracted with acetonitrile.The linearity of the GC-ECD method was satisfied(R2=0.999 4)in the concentration range of 0.01～2.0 mg·kg-1. The average recov-eries in soil were 95.91%, 89.50%and 75.35%, respectively, the coefficients of variation were 2.66%, 7.64% and 4.23%, by adding clodi-nafop-propargyl into wheat soil at three concentration levels(0.01, 0.1, 0.5 mg·kg-1).The limit of quantification in soil was 0.01 mg·kg-1. The detection results showed that GC-ECD method was economic and accurate whose pretreatment was simple and rapid. Two years field experi-ments in Shandong Province and Hunan Province revealed that the residue of degradation dynamics in 30 d were more than 99%, and the half-life of clodinafop-propargyl were 2.7～3.9 d. |
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