朱剑峰1，3，叶文彬1，2，胡海涛1，3

(1.水利部水文水资源监控工程技术研究中心，江苏 南京 210012;2. 江苏南水科技有限公司，江苏 南京 210012;3.水利部南京水利水文自动化研究所，江苏 南京210012)

　　摘要：滴定反应器是滴定法高锰酸盐指数分析仪的核心部件，目前高锰酸盐指数分析仪大多使用电极法滴定反应器，电极需要浸入反应液，电极信号容易受反应液的干扰，电极液也需要定期更换，维护不方便。为了解决电极法滴定反应器缺点用光电方法检测反应液颜色的变化，并基于该方法设计光电滴定反应器，由光源发射光线穿透反应液，接收器检测透光度的变化判定滴定终点。经实验室对比测试，表明使用光电反应器的高锰酸盐指数分析仪在准确度、精密度、标准曲线、和实际水样比对等各项指标均优于《高锰酸盐指数水质自动分析仪技术要求》所要求的指标。该光电滴定反应器采用非接触式方法，不易受到水体色度、浊度、酸碱度的影响，应用与维护简单方便。

　　关键词：光电感应滴定反应器;高锰酸盐指数;高锰酸盐指数分析仪;水质分析仪

　　Design and Application of photoelectric titration reactor in permanganate index analyzer

　　Zhu Jianfeng 1, 3, Ye Wenbin 1, 2， Hu Haitao 1，3

　　(1. Hydrology and Water Resources Monitoring Engineering Research Center, Ministry of Water Resources, Nanjing 210012, China;

　　2. Jiangsu Nanshui Technology Co., Ltd., Nanjing 210012, China;

　　3. Nanjing Research Institute of Hydrology & Water Conservation Automation, Ministry of Water Resources,Nanjing 210012, China)

　　Abstract: The titration reactor is the core component of titration method permanganate index analyzer, and most of the permanganate index analyzers use electrode method titration reactor presently. Because the electrode needs to be immersed in the reaction solution, the electrode signal is easily disturbed by the reaction solution, and the electrode solution also needs to be replaced regularly, which is not convenient in maintenance. In order to solve the shortcomings of the titration reactor with electrode method, a photoelectric titration reactor was designed based on the photoelectric method which detects the color change of reaction solution and uses light source emits light to penetrate the reaction solution, and a receiver detects the change of transmittance to determine the titration endpoint . After the laboratory comparison test, it indicates that the permanganate index analyzer’s indexes using photoelectric reactor are better than indexes required by the Technical Requirements for Automatic Permanganate Index Water Quality Analyzer in terms of accuracy, precision, standard curve, and actual water samples comparison. The photoelectric titration reactor adopts non-contact method, which is not affected by the chromaticity, turbidity, acidity and alkalinity of water body, and is simple and convenient in application and maintenance.

　　Keywords: photoelectric inductive titration reactor, permanganate index, permanganate index analyzer, water quality analyzer