碘甲磺隆钠盐的水解特性

Characterizing Hydrolysis of Iodosulfuron-Sodium

通过实验室的模拟试验研究了碘甲磺隆钠盐在不同温度、pH值及不同水体条件下的水解动态。结果表明:碘甲磺隆钠盐在正常的环境条件(水的pH值为7,25℃,灭菌)下,碘甲磺隆钠盐难以水解,其降解半衰期长达157.5d,而在酸性条件下稳定性较差,容易水解,其半衰期缩短了10倍,仅为15.5d;温度对碘甲磺隆钠盐的水解速率有一定的影响,当pH为4时,其水解速率随温度的升高而加快,当温度为15℃、25℃、35℃时,半衰期分别为23.9、15.5、12.3d;碘甲磺隆钠盐在蒸馏水中的水解速率与在河水中的水解速率相似。

The dynamics of iodosulfuron-sodium hydrolysis were studied in laboratory simulation experiments at different temperatures, pH, and water conditions. Iodosulfuron-sodium hydrolyzed with difficulty under normal environmental conditions (sterile water at pH 7 and 25℃), with a half-life of 157.5 days. Its stability was relatively low, however, in acidic conditions where it hydrolyzed readily, with a half-life of 15.5 days (only one-tenth as long). Iodosulfuron-sodium hydrolysis rates were affected somewhat by temperature. At pH 4, hydrolysis rate increased with increasing temperature, with half-lives of 23.9, 15.5, and 12.3 d at 15, 25, and 35℃, respectively. Iodosulfuron- sodium hydrolysis rates were similar in distilled and river water.