Residues and Analysis of Degradation of Novel Fungicide Picoxystrobin in Cucumber and Soil Under Field Conditions
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 0.0...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Agro-Environmental Protection Institute, Ministry of Agriculture
2014-10-01
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| Series: | Journal of Agricultural Resources and Environment |
| Subjects: | |
| Online Access: | http://www.aed.org.cn/nyzyyhjxb/html/2014/5/20140513.htm |
| Summary: | 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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| ISSN: | 2095-6819 2095-6819 |