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| 新型杀菌剂啶氧菌酯在田间黄瓜和土壤中的残留消解动态及残留分析 |
| Residues and Analysis of Degradation of Novel Fungicide Picoxystrobin in Cucumber and Soil Under Field Conditions |
| Received:May 13, 2014 |
| DOI：10.13254/j.jare.2014.0128 |
| 中文关键词: 啶氧菌酯;黄瓜;土壤;消解;残留 |
| 英文关键词: picoxystrobin;cucumber;soil;dissipation;residues |
| 基金项目:农业部农药残留试验资助项目 |
| Author Name | Affiliation | E-mail | | SUN Yang | Department of Pollution Control,Institute of Agro-environmental Protection,Ministry of Agriculture of China,Key Laboratory of Original Agro- environmental Quality of Ministry of Agriculture/Tianjin Key Laboratory of Agro-environmentand Agro-product Safety,Tianjin 300191,China | | | XU Ying-ming | Department of Pollution Control,Institute of Agro-environmental Protection,Ministry of Agriculture of China,Key Laboratory of Original Agro- environmental Quality of Ministry of Agriculture/Tianjin Key Laboratory of Agro-environmentand Agro-product Safety,Tianjin 300191,China | ymxu1999@126.com | | QIN Xu | Department of Pollution Control,Institute of Agro-environmental Protection,Ministry of Agriculture of China,Key Laboratory of Original Agro- environmental Quality of Ministry of Agriculture/Tianjin Key Laboratory of Agro-environmentand Agro-product Safety,Tianjin 300191,China | | | ZHAO Li-jie | Department of Pollution Control,Institute of Agro-environmental Protection,Ministry of Agriculture of China,Key Laboratory of Original Agro- environmental Quality of Ministry of Agriculture/Tianjin Key Laboratory of Agro-environmentand Agro-product Safety,Tianjin 300191,China | |
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| 中文摘要: |
| 建立了黄瓜和土壤中啶氧菌酯残留量的检测分析方法,对啶氧菌酯在黄瓜和土壤中的消解动态及残留规律进行了研究。啶氧菌酯的最小检出量为3.5×10-11g;在黄瓜和土壤基质中的最低检出浓度均为0.005mg·kg-1。对黄瓜和土壤2种基质,设置了0.005、0.05、0.25 mg·kg--1个添加水平,每个添加水平设置5个重复,啶氧菌酯在黄瓜和土壤中的添加回收率为68.61%-122.4%,变异系数为1.06%-17.2%。田间试验结果表明:啶氧菌酯在天津地区黄瓜和土壤中的残留消解半衰期分别为5.71d和12.9 d,在山东地区黄瓜和土壤中的残留消解半衰期分别为2.70d和10.3 d,在江苏地区黄瓜和土壤中的残留消解半衰期分别为9.76d和14.9 d。距最后一次施药5d时,啶氧菌酯在黄瓜中的最高残留量为0.014mg·kg-1,远低于欧盟规定的黄瓜中啶氧菌酯最大残留限量0.05mg·kg-1。 |
| 英文摘要: |
| The analytical method for the residues of picoxystrobin in cucumber vegetable and soil matrices was developed and the dissipation of picoxystrobin under field conditions was studied. The limit of detection(LOD)of picoxystrobin was 3.5×10 -11 g and the limit of quantifica-tion(LOQ)was found to be 0.005 mg·kg -1 in cucumber and soil. At three different spiking levels(0.005, 0.05, 0.25 mg·kg -1), mean recoveries and relative standard deviation(RSD)from fortified samples in five replicated experiments for each matrix were in the range of 68.61%-122.4% and 1.06%-17.2%, respectively. The results showed that the half-lives of picoxystrobin in cucumber and soil from Tianjin City were 5.71 d and 12.9 d, respectively, the half-lives of picoxystrobin in cucumber and soil from Shandong Province were 2.70 d and 10.3 d, respec-tively, and the half-lives of picoxystrobin in cucumber and soil from Jiangsu Province were 9.76 d and 14.9 d, respectively. The maximum residual concentration of picoxystrobin on the 5th day after the last application was 0.014 mg· kg -1, much lower than the Maximum Residue Limits(MRLs)for picoxystrobin in cucumber according to the standards of EU(0.05 mg·kg-1). |
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