氯嘧磺隆在不同pH下的水解动力学研究  

Hydrolysis dynamics of Chlormuron-ethly in different pH buffer solu-tions

作　　者：李霞[1] 韩玉军[1] 陶波[1] 

机构地区：[1]东北农业大学农学院,哈尔滨150030

出　　处：《东北农业大学学报》2011年第4期107-111,共5页Journal of Northeast Agricultural University

基　　金：哈尔滨市科技攻关项目(2007AA6CN097)

摘　　要：采用高效液相色谱法,研究了氯嘧磺隆在不同pH下的水解。结果表明,氯嘧磺隆在中性及碱性条件下稳定,不易水解;在酸性条件下不稳定,易发生水解。随着pH值的增大,氯嘧磺隆的水解反应速率逐渐减慢,速率常数K减小,半衰期相应的增大,氯嘧磺隆在pH3.0、4.0、5.0、6.0、7.0、8.0、9.0的缓冲液中的水解半衰期分别为9.67、13.72、22.21、62.43、173.25、210.00、256.67d。Hydrolysis dynamics of Chlormuron-ethly in different pH values was researched by HPLC.Results showed that Chlormuron-ethly was unstable and easier to be hydrolyzed in acid buffer solutions.However,it was stable in basic water and the hydrolysis rate slowed that the rate constantly decreased,the half-life increased with the increase of pH values.The half-life of Chlormuron-ethly in buffer solutions were 9.67 d for pH 3.0;13.72 d for pH 4.0;and 22.21 d for pH 5.0;62.43 d for pH 6.0;173.25 d for pH 7.0;210.00 d for pH 8.0;256.67 d for pH 9.0,respectively.

关 键 词：氯嘧磺隆 水解 半衰期 液相色谱法 

分 类 号：S767.5[农业科学—森林保护学] X172[农业科学—林学]