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Position: Home > Articles > Improvement of Method in Measuring Milk Calium with KMnO_4 Dripping Chinese Qinghai Journal of Animal and Veterinary Sciences 2001,31 (4) 10-30

高锰酸钾滴定测定乳钙方法的改进

作  者:
马森;陈世彪;顾顺元;丁猛
单  位:
西宁;青海大学农牧学院;西宁奶牛场 西宁;西宁奶牛场
关键词:
乳;钙含量;高锰酸钾滴定法
摘  要:
对高锰酸钾滴定法测定乳钙的方法进行了改进;以4%草酸铵直接沉淀乳中钙,以稀氨水洗去多余的草酸铵,再加入0.5mol/L硫酸使草酸游离,然后以标准高锰酸钾液滴定草酸,间接求出钙含量。20份乳样用改进的方法和国家标准方法测定结果之间无显著差异(P>0.1);改进方法的重复试验结果的C.V%为2.88%,回收率为(93.06±4.88)%。改进的方法省略了消化过程,使乳钙测定简便化。
译  名:
Improvement of Method in Measuring Milk Calium with KMnO_4 Dripping
作  者:
MA Sen et al. (Faculty of Agriculture and Animal Sciences,Qinghai University,Xining,810003)
关键词:
Milk,Calium consistence,KMnO4 dripping method
摘  要:
The method of measuring milk Calium was improved with KMnO4 dripping.The milk Calium was sedimented directly with 4%(NH4)2C2O4,the surplus(NH4)2C2O4 was washed with low consistence NH3·H2O and 0.5mol/L H2SO4 was added so that the H2C2O4 was free.Then,the H2C2O4 was dripped with standard KMnO4 to measure indirectly milk Calium consistence.There was no marked defference between the improved and the standardized method in 20 samples (P>0.1).The results showed that the c.v of repeated trials was 2.88% and the recovery rate was 93.06±4.88% by improved method.It left out the process of digesting and simplified the method of measuring milk Calium.

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