氟唑菌酰羟胺和苯醚甲环唑在烟叶中的消解动态及残留分析
Dissipation dynamics and residue analysis of pydiflumetofen and difenoconazole in tobacco
李敏 1张碰元 1熊书斌 2黄长权 3周军 3陈玉珍 3张馨文 3冯佳 4王杰4
作者信息
- 1. 河北中烟工业有限责任公司,石家庄 050000
- 2. 江西省烟草公司抚州市公司,江西抚州 344000
- 3. 先正达(中国)投资有限公司,上海 310000
- 4. 中国农业科学院烟草研究所,山东青岛 266101
- 折叠
摘要
[目的]明确200 g/L氟唑菌酰羟胺·苯醚甲环唑悬浮剂在烟叶中的消解动态和最终残留量.[方法]结合田间试验数据,建立了氟唑菌酰羟胺和苯醚甲环唑在烟叶中的超高效液相色谱-串联质谱法.[结果]200 g/L氟唑菌酰羟胺·苯醚甲环唑(120 g a.i./hm2)施药2次后,氟唑菌酰羟胺在鲜烟叶和干烟叶中的原始沉积量分别为2.2、6.2 mg/kg,施药14d后消解率介于51.7％～70％,半衰期为6～9 d;苯醚甲环唑在鲜烟叶和干烟叶中的原始沉积量分别为3.1、14 mg/kg,施药14 d后消解率达到58.1％～83.6％,半衰期为4～9 d,消解规律均符合一级动力学模型,属于易降解农药.14 d最终残留量表明:200 g/L氟唑菌酰羟胺和苯醚甲环唑悬浮剂在鲜烟叶中的最大残留量分别为0.52、0.55 mg/kg,在干烟叶中的最大残留量分别为1.68、2.24 mg/kg,2者在干烟叶中的残留量均高于鲜烟叶.[结论]为氟唑菌酰羟胺和苯醚甲环唑在烟叶中的安全使用及我国最大残留限量的制定提供了数据支持.
Abstract
[Aims]This study aims to determine the dissipation dynamics and residues of pydiflumetofen· difenoconazole 200 g/L suspension concentrate on tobacco.[Methods]Based on field trial data,a high performance liquid chromatography tandem mass spectrometry method was established for the simultaneous determination of pydiflumetofen and difenoconazole on tobacco.[Results]After applying pydiflumetofen·difenoconazole 200 g/L suspension concentrate twice,the original residual amount of pydiflumetofen for fresh tobacco leaves and dried tobacco leaves was 2.2 and 6.2 mg/kg,respectively;the dissipation rate was 51.7％-70％on day 14 after application,and the half-life was 6-9 d.The original residual amount of difenoconazole for fresh tobacco leaves and dry tobacco leaves was 3.1 and 14 mg/kg,respectively;the dissipation rate was 58.1％-83.6％on day 14 after application,and the half-life was 4-9 d.Dissipation of pydiflumetofen and difenoconazole in tobacco was in accordance with the first-order kinetics equation,therefor it was easy to degrade.On day 14 after application of pydiflumetofen·difenoconazole 200 g/L suspension concentrate,the maximum residue was 0.52 and 0.55 mg/kg in fresh tobacco leaves,1.68 and 2.24 mg/kg in dry tobacco leaves,respectively.[Conclusions]The results of this study provide data support for the safe use of pydiflumetofen and difenoconazole on tobacco and the establishment of maximum residue limits in China.
关键词
氟唑菌酰羟胺/苯醚甲环唑/消解动态/最终残留量Key words
pydiflumetofen/difenoconazole/dissipation/final residue引用本文复制引用
基金项目
&&(202313000340017)
&&(202201010)
出版年
2024
NETL
NSTL
维普
万方数据