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在小麦中同时测定pyroxasulfone及其代谢物:对安全应用的影响

Feng Lan¹, Xueting Sun², Renshan Wang³

¹Testing Center of Fruit and Seedling Quality, Laboratory of Quality and Safety Risk Assessment for Fruit, Ministry of Agriculture and Rural Affairs, Key Laboratory of Quality, Safety and Nutrition of Characteristic Fruits, Yantai Academy of Agricultural Sciences, Yantai 265500, China.

|June 21, 2025

概括

在中国的小麦中评估了pyroxasulfone除草剂残留物. 谷物中的残留物低于安全限值,健康风险低,支持有效控制杂草的推应用率.

科学领域:

农业化学农业化学
环境科学环境科学
食品安全食品安全

背景情况:

氧硫是一种广泛使用的除草剂,用于在小麦种植中控制杂草.
了解其残留动态对于中国的安全农业实践和监管合规性至关重要.

研究的目的:

在中国条件下,测定冬季小麦谷物和草中的pyroxasulfone和代谢物残留物.
建立安全使用指南和最大残留量限制 (MRL).
评估与pyroxasulfone使用相关的潜在的饮食摄入风险.

主要方法:

在中国10个主要的小麦生产地区进行的实地试验.
开发和验证一种UPLC-MS/MS方法,用于量化pyroxasulfone和四种代谢物.
在小麦谷物和草中分析氧硫残留物.

主要成果:

经过验证的UPLC-MS/MS方法显示了高精度 (7393%的恢复) 和精度 (715%的RSD).
在草中仅检测到M1代谢物 (0.0340.18毫克/公斤);在谷物中,所有分析物都低于LOQ (<0.02毫克/公斤).
饮食风险评估表明没有显著的人类健康问题.

结论:

建议使用40%的pyroxasulfone悬浮剂,每公每年180克,用于预先出现的土壤应用,可确保有效的杂草控制.
在小麦谷物中,pyroxasulfone残留量远低于已确定的安全值.
这些发现支持在中国小麦生产中合理使用pyroxasulfone.

关键词:

代谢物的代谢物.氧硫是一种氧硫.剩余物剩余物剩余物在 UPLC MS/MS/MS 中.小麦小麦小麦小麦的小麦.

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