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首页> 外文期刊>Journal of environmental science and health >Evaluation of photolysis and hydrolysis of pyraclostrobin in aqueous solutions and its degradation products in paddy water
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Evaluation of photolysis and hydrolysis of pyraclostrobin in aqueous solutions and its degradation products in paddy water

机译：稻瘟病菌水溶液中吡唑醚菌酯的光解水解及其降解产物的评价

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摘要

This study evaluated the hydrolysis and photolysis kinetics of pyraclostrobin in an aqueous solution using ultra-high-performance liquid chromatography-photodiode array detection and identified the resulting metabolites of pyraclostrobin by hydrolysis and photolysis in paddy water using high-resolution mass spectrometry coupled with liquid chromatography. The effect of solution pH, metal ions and surfactants on the hydrolysis of pyraclostrobin was explored. The hydrolysis half-lives of pyraclostrobin were 23.1-115.5 days and were stable in buffer solution at pH 5.0. The degradation rate of pyraclostrobin in an aqueous solution under sunlight was slower than that under UV photolysis reaction. The half-lives of pyraclostrobin in a buffer solution at pH 5.0, 7.0, 9.0 and in paddy water were less than 12 h under the two light irradiation types. The metabolites of the two processes were identified and compared to further understand the mechanisms underlying hydrolysis and photolysis of pyraclostrobin in natural water. The extracted ions obtained from paddy water were automatically annotated by Compound Discoverer software with manual confirmation of their fragments. Two metabolites were detected and identified in the pyraclostrobin hydrolysis, whereas three metabolites were detected and identified in the photolysis in paddy water.
机译：这项研究使用超高效液相色谱-光电二极管阵列检测评估了吡菌胺酯在水溶液中的水解和光解动力学，并通过高分辨率质谱联用液相色谱法在稻田水中水解和光解法鉴定了吡菌酯的代谢产物。 。探讨了溶液的pH值，金属离子和表面活性剂对吡菌胺酯水解的影响。吡咯菌酯的水解半衰期为23.1-115.5天，在pH 5.0的缓冲溶液中稳定。在阳光下水溶液中吡咯菌酯的降解速率比在紫外光解反应下的降解速率慢。在两种光照射类型下，吡咯菌酯在pH 5.0、7.0、9.0的缓冲溶液中和在稻水中的半衰期均小于12小时。确定并比较了这两个过程的代谢物，以进一步了解吡咯菌酯在天然水中的水解和光解机理。从稻田水中提取的离子由Compound Discoverer软件自动注释，并手动确认其碎片。在稻瘟病菌水解中检测和鉴定了两种代谢物，而在稻田水中的光解中检测和鉴定了三种代谢物。

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  • 来源
    《Journal of environmental science and health》 |2019年第6期|317-325|共9页
  • 作者

    Zeng Ling R.; Shi Li H.; Meng Xin G.; Xu J.; Jia Gui F.; Gui T.; Zhang Yu P.; Hu De Y.;

  • 作者单位

    Guizhou Univ, State Key Lab Breeding Base Green Pesticide & Agr, Key Lab Green Pesticide & Agr Bioengn, Minist Educ, Guiyang 550025, Guizhou, Peoples R China;

    Guizhou Univ, State Key Lab Breeding Base Green Pesticide & Agr, Key Lab Green Pesticide & Agr Bioengn, Minist Educ, Guiyang 550025, Guizhou, Peoples R China;

    Guizhou Univ, State Key Lab Breeding Base Green Pesticide & Agr, Key Lab Green Pesticide & Agr Bioengn, Minist Educ, Guiyang 550025, Guizhou, Peoples R China;

    Guizhou Univ, State Key Lab Breeding Base Green Pesticide & Agr, Key Lab Green Pesticide & Agr Bioengn, Minist Educ, Guiyang 550025, Guizhou, Peoples R China;

    Guizhou Univ, State Key Lab Breeding Base Green Pesticide & Agr, Key Lab Green Pesticide & Agr Bioengn, Minist Educ, Guiyang 550025, Guizhou, Peoples R China;

    Guizhou Univ, State Key Lab Breeding Base Green Pesticide & Agr, Key Lab Green Pesticide & Agr Bioengn, Minist Educ, Guiyang 550025, Guizhou, Peoples R China;

    Guizhou Univ, State Key Lab Breeding Base Green Pesticide & Agr, Key Lab Green Pesticide & Agr Bioengn, Minist Educ, Guiyang 550025, Guizhou, Peoples R China;

    Guizhou Univ, State Key Lab Breeding Base Green Pesticide & Agr, Key Lab Green Pesticide & Agr Bioengn, Minist Educ, Guiyang 550025, Guizhou, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Pyraclostrobin; hydrolysis; photolysis; degradation products; high-resolution mass;

    机译：吡菌胺;水解;光解;降解产物;高分辨率物质;

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