自动电位滴定法测定气田废水中的C1^-

The Determination of C1^- in Gasfield Sewage by Automatic Potentiometric Method

利用电位滴定法在７１６ＤＭＳ型自动电位滴定仪上实现对气田废水中Ｃ１－的快速、灵敏、准确测定，避免了色度、浊度的干扰。对方法的检出限、标样和实际水样精密度、准确度，进行了全面的测定分析，并与硝酸银滴定法进行了对比。氯化物的检出限为０．３２ｍｇ／Ｌ；相对标准偏差小于等于２．１％，加标回收率在９８．９％１０１％范围内，对同一标样和实际样品的测定两种方法的结果吻合较好。

The method avoided the confusion from chroma and cloudiness for determining the C1- content in gasfieldsewage with 716 DMS Titrino. Authors carried out an overall determination and analysis on the method in terms of detectedlimit, the precision and accuracy of standard sample and actual sample, and this method was compared with silver nitratetitrimetry in laboratory. The detected limit of chloridate was 0.32mg/L while relative standard deviation less than 2.1% andmark-on recovery ranging from 98.9% to 101%, The results of the two methods coincided fairly for determining standard andactual samples with same C1- content.