[1]罗烨,梁钟璇,刘汉林.DPD分光光度法测定水中游离氯和总氯方法改进[J].中国给水排水,2022,38(18):129-133.
　LUOYe,LIANG Zhong-xuan,LIUHan-lin.Improvement of DPD Spectrophotometric Method for Determination of Free Chlorine and Total Chlorine in Water[J].China Water & Wastewater,2022,38(18):129-133.
点击复制

DPD分光光度法测定水中游离氯和总氯方法改进

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第38卷 期数: 2022年第18期 页码: 129-133 栏目: 出版日期: 2022-09-17
Title:
Improvement of DPD Spectrophotometric Method for Determination of Free Chlorine and Total Chlorine in Water
作者:
罗烨， 梁钟璇， 刘汉林
（遵义生态环境监测中心，贵州 遵义 563000）
Author(s):
LUO　Ye， LIANG Zhong-xuan， LIU　Han-lin
（Zunyi Ecological Environment Monitoring Center， Zunyi 563000， China）
关键词:
游离氯;  总氯;  N; N-二乙基-1; 4-苯二胺（DPD）;  校准曲线;  标准溶液
Keywords:
free chlorine;  total chlorine;  N; N-diethyl-1; 4-phenylenediamine(DPD);  calibration curve;  standard solution
摘要:
针对DPD分光光度法在测定水样中低浓度游离氯和总氯时校准曲线难以满足要求的问题，建立了高锰酸钾-碘化钾标准溶液体系，并研究其替代标准方法中规定的碘酸钾-碘化钾标准溶液体系的可行性。试验表明，高锰酸钾-碘化钾标准溶液体系可以解决低浓度点显色偏低的问题，而且该方法与原标准方法相比操作更简便、测定速度更快。方法检出限为0.003 mg/L，可满足低浓度水样（如地表水）中游离氯和总氯的测定要求。
Abstract:
Calibration curve of DPD spectrophotometry is difficult to meet the requirements in the determination of low concentration free chlorine and total chlorine in water samples. To solve this problem, a potassium permanganate and potassium iodide standard solution system was established, and the feasibility of replacing the potassium iodate and potassium iodide standard solution system in standard method was investigated. The potassium permanganate and potassium iodide standard solution system effectively solved the problem of low color at low concentration points, and the method was simpler and faster than the original standard method. The method detection limit was 0.003 mg/L, which can meet the requirements for the determination of low concentration free chlorine and total chlorine in water samples (such as surface water).
更新日期/Last Update: 2022-09-17