焦化厂废水中氨的测定——气敏电极法

AMMONIA MEASUREMENT IN THE COKING WASTEWATER WITH GAS SENSITIVE ELECTRODE

研究了用气敏电极测定焦化厂废水中氨的分析方法，对测定的线性范围，响应时间、回收率、干扰物质等作了理论探讨和大量试验。在ｐＨ为１１５～１４０时，线性范围为１００×１０－５～１００×１０－１ｍｏｌ／Ｌ，最低检出限为５０×１０－６ｍｏｌ／Ｌ，ＲＳＤ≤２５％。

Analysis method of ammonia in coking wastewater by means of gas sensitive electrode was introduced in the paper and also were analysed the linear range,responvesponse time,reused ratio and interfering substance.When pH in the wastewater is around 11 5～14 0,the linear range amounts to 1 00×10 -5 ～1 00×10 -1 mol/L,the lowest detection is 5 0×10 -6 mol/L,RSD is ≤2 5%.