酸性高锰酸钾滴定法测定饮用水中高锰酸盐指数  

Acidic Potassium Permanganate Titration Method for Determination of Permanganate Index in Potable Water

作　　者：苏新科 商健 王杨阳 孙润聪 刘锋军 SU Xinke;SHANG Jian;WANG Yangyang;SUN Runcong;LIU Fengjun(Weinan Testing Institute,Weinan 714000,China)

机构地区：[1]渭南市检验检测研究院,陕西渭南714000

出　　处：《现代食品》2025年第5期192-194,208,共4页Modern Food

摘　　要：水中高锰酸盐指数是评估饮用水水质的常用指标之一,为了更准确地测定高锰酸盐指数,在《生活饮用水标准检验方法第7部分:有机物综合指标》(GB/T 5750.7—2023)(4.1)的基础上进一步考察了加热沸腾时间、滴定反应温度、酸度对检测结果的影响,最终得到最佳样品分析条件:加热沸腾时间为32 min,滴定反应温度为75~80℃,硫酸加入体积为5 mL。同时,验证了该优化条件下的方法性能,结果表明,精密度良好,参加省级实验室比对结果满意,质控样品测定结果满足质控要求。The permanganate index in water is one of the common indicators for assessing the quality of potable water.To determine the permanganate index more accurately,this study further investigated the effects of heating boiling time,titration reaction temperature,and acidity on the detection results based on GB/T 5750.7—2023(4.1).Eventually,the sample analysis conditions were selected as follows:the heating boiling time was 32 min,the titration reaction temperature was 75~80℃,and the volume of sulfuric acid added was 5 mL.Meanwhile,the method performance under these optimized conditions was verified,manifested as follows:good precision,the comparison results of provincial laboratories were satisfactory,and the determination results of quality control samples met the quality control requirements.

关 键 词：饮用水 高锰酸盐指数 酸性高锰酸钾法 

分 类 号：X832[环境科学与工程—环境工程]