1前言百菌清属于取代苯类广谱性杀菌剂,主要用于果树、蔬菜上锈病、炭疽病、白粉病、霜霉病的防治,对弱酸、弱碱及光热稳定,无腐蚀作用。在植物表面易粘着,耐雨水冲刷。百菌清分析方法,目前文献及各文刊多为气相色谱分析方法。国标采用填充柱或玻璃柱气相色谱法,固定相为硅酮5%的OV-17+1.1%OV-225,内标 1 Introduction Chlorothalonil belongs to the broad-spectrum bactericide substituted benzene, mainly used for the prevention and control of rust, anthracnose, powdery mildew and downy mildew on fruit trees and vegetables. It is stable and has no corrosive effect on weak acids, weak bases, and light and heat. Easy to stick in the plant surface, resistant to rain erosion. Chlorothalonil analysis method, the current literature and various publications mostly gas chromatography. GB using packed column or glass column gas chromatography, the stationary phase of silicone 5% OV-17 + 1.1% OV-225, the internal standard