环境水样中氯化物测定方法探讨

文章目的：分析用硝酸银滴定法测定水中氯化物,滴定终点溶液颜色的变化特征,总结其规律,以便分析者做为参考。方法：以环境监测标准中推荐的硝酸银滴定法GB11896-89进行实验测定。结果：当看到溶液为明显的砖红色时,早已过了等当点和滴定终点了,当溶液为比较明显的灰黄色时,虽然已经过了等当点了,但却是滴定终点,用其点计算可以得到准确的结果。结论：在水样滴定的全过程中,不要找溶液成什么明显的砖红色时即为终点,而要找溶液成为较明显的灰黄色时,即为水样滴定终点,用这个点进行计算往往可以得到满意的结果。

Study on Determination Methods of Chloride in Environmental Water Sample

Aim Analysis using silver nitrate titration of chloride in water,titration endpoint solution color change feature,summing up its own rules for analysts as a reference.Methods： To environmental monitoring standards recommended by the silver nitrate titration method GB11896-89 for protein.Results： When you see the obvious solution brick red,well past the equivalence point and end point of titration,and when the solution is obvious sallow,although the equivalence point has been,and it is the end point of titration,with its point accurate results can be calculated.Conclusion： Titration of water samples throughout the process,not to find any clear solution into a brick-red when it is the end,but to find the solution to become more obvious when sallow,namely water titration end point,calculated using this point can often be satisfactory results.