摘要
从反应酸度和反应时间2个方面,对高锰酸盐指数测定方法进行了研究。结果表明:在同一酸度条件下,高锰酸盐指数测定值随反应时间的延长而逐渐增大;在相同反应时间内,高锰酸盐指数测定值随反应酸度的增大而逐渐增大。综合以上2条件试验得出,加入5 mL浓硫酸,水浴12 m in,测得的高锰酸盐指数与国标方法(GB 11892—89)测定结果无显著差异。改进后的测定方法可大大提高分析测试效率。
The permanganate index method determination was studied from the aspects of reaction acidity and reaction time. The results showed that the determined value of permanganate index increased with the reaction time prolonging under the same reaction acidity, and it increased with the increase of reaction acidity under the same reaction time. There was no significant difference between the permanganate index which was determined with concentrated sulfuric acid and 12 min water bath and that determined by the national standard method （GB 11892-89） . The improved determination method could greatly increase the analysis and test efficiency.
出处
《河北农业科学》
2009年第8期165-166,170,共3页
Journal of Hebei Agricultural Sciences
