有机物中微量氯的测定

Determination of Microamount Chlorine in Non-halogenated Organics

介绍了一种测定非卤化有机物中微量氯的方法 ,即以碱性H2 O2 溶液为吸收液 ,用HNO3 溶液调节pH为 7～ 9.5 ,以K2 CrO4溶液为指示剂 ,用AgNO3 标准溶液滴定。回收率在97%～ 1 0 1 % ,相对标准偏差为 1 .8%～ 4.7%。

A method for determination of microamount chlorine in non-halogenated organics is introduced. To do this, alkaline H 2O 2 solution is chosen as absorbing liquid, and the pH of the solution is adjusted to 7～9.5 with HNO 3 solution. Using K 2CrO 4 solution as indicator, the absorbing liquid is then titrated with AgNO 3 standard solution. The recovery efficiency of this method is in the range of 97% ～101%, and the relative standard deviation is about 1.8%～4.7%.