| 乙虫腈在水稻土壤和田水中的残留及消解动态研究 |
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| 引用本文： | 尚子帅,吴慧明,秦丽,马新生,刘菲菲,朱国念.乙虫腈在水稻土壤和田水中的残留及消解动态研究[J].农药学学报,2011,13(6):632-636. |
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| 作者姓名： | 尚子帅 吴慧明 秦丽 马新生 刘菲菲 朱国念 |
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| 作者单位： | 1.浙江大学 农药与环境毒理研究所,杭州 310029 |
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| 摘 要： | 为研究乙虫腈对淹水稻田土壤生态环境的安全性,在田间和室内模拟试验条件下,定期取样检测了乙虫腈在土壤和田水中的消解动态。样品采用醋酸-乙腈(1∶99,体积比)提取,经 N -丙基乙二胺(PSA)净化,超高效液相色谱-串联质谱(UPLC-MS/MS)检测,外标法(ESTD)定量。结果表明,在0.001~0.1 mg/L质量浓度范围内,乙虫腈的仪器响应值与质量浓度呈良好的线性关系,相关系数均在0.98以上。方法的最小检出量(LOD)为2.2×10-13 g,乙虫腈在稻田土壤和田水中的最低检测浓度(LOQ)为0.001 mg/kg(L)。当土壤中的添加水平为0.002~1.0 mg/kg时,回收率在80.2%~119.5%之间,相对标准偏差(RSD)最大为9.0%;田水中的添加水平为0.001~1.0 mg/L时,回收率在94.2%~108.2%之间, RSD最大为13.2%。消解动态试验结果表明,乙虫腈在水稻土壤和田水样品中的消解均符合一级动力学方程,其在室内外水稻土壤及田水中消解迅速,半衰期分别为3.2~2.8 d和3.5~1.8 d,属于易降解性农药。
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| 关 键 词： | 乙虫腈 超高效液相色谱-串联质谱 稻田土壤 水 消解动态 |
| 收稿时间： | 9/6/2011 12:00:00 AM |
| 修稿时间： | 2011/10/19 0:00:00 |
Residue decline study of ethiprole in paddy field soil and water |
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| SHANG Zi-shuai,WU Hui-ming,QIN Li,MA Xin-sheng,LIU Fei-fei and ZHU Guo-nian.Residue decline study of ethiprole in paddy field soil and water[J].Chinese Journal of Pesticide Science,2011,13(6):632-636. |
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| Authors: | SHANG Zi-shuai WU Hui-ming QIN Li MA Xin-sheng LIU Fei-fei and ZHU Guo-nian |
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| Institution: | 1.Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310029, China |
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| Abstract: | In order to study the safety of ethiprole to paddy soil ecosystem,residue decline of ethiprole in soil and water were investigated under field and field-simulated condition.The samples were extracted by acetic-acetonitrile(1∶99, V∶V),cleaned up with primary secondary amine (PSA),and analyzed by UPLC-MS/MS.External reference method was used for quantitative determination.The linearity was satisfied (r>0.98) in the concentration range of 0.001-0.1 mg/L.The limit of detection(LOD) was 2.2×10-13 g,and the limit of quantification (LOQ) in paddy soil and water were 0.001 mg/kg(L).The average fortification recoveries varied from 80.2% to 119.5% with relative standard deviation (RSD) of 3.1%-9.0% when ethiprole was spiked at 0.002-1.0 mg/kg level in soil matrix,the average fortification recoveries varied from 94.2%-108.2% with relative standard deviation (RSD) of 1.6%-13.2% when ethiprole was spiked at 0.001-1.0 mg/L level in water matrix.The decline study of ethiprole residue in paddy field soil and water were carried out,the decline curves accorded with the first-order kinetics equation,and the half-lives of ethiprole in soil and water under field-simulated and field condition were of 3.2-2.8 d and 3.5-1.8 d,respectively.Ethiprole belongs to the easily degradable pesticide. |
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| Keywords: | ethiprole UPLC-MS/MS paddy soil water residue decline study |
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