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甲草胺是一种广泛用于农作物上的酰胺类除草剂.本文利用裂解气相色谱与质谱联用(Py-GC-MS)研究了甲草胺在热裂解温度200℃、400℃、600℃、800℃下的降解产物和热降解机理.实验结果表明,共有60种裂解产物被分离鉴定,随着温度的升高甲草胺显著分解,当裂解温度超过600℃时,大量的芳烃类、喹啉类、吲哚类化合物在高温裂解中产生,温度越高他们的相对含量也越高.基于对裂解产物的定性和它们含量的变化提出了甲草胺的热降解机理.
Alachlor is a herbicide widely used in agricultural crops.In this paper, the pyrolysis of alachlor at temperatures of 200 ℃, 400 ℃ and 600 ℃ was studied by Pyrolysis Gas Chromatography-Mass Spectrometry (GC-MS) , The degradation products at 800 ℃ and the thermal degradation mechanism.The results showed that a total of 60 kinds of pyrolysis products were isolated and identified, with the temperature increased alachlor significantly decomposed, when the pyrolysis temperature exceeds 600 ℃, a large number of aromatic hydrocarbons, Quinolines and indoles are produced at high temperature and their relative content is higher at higher temperature.The mechanism of thermal degradation of alachlor is proposed based on the qualitative analysis of the products and their contents.