地表水自动监测站高锰酸盐指数在线监测仪测定误差原因分析及解决办法

从仪器量程及温度、加热时间、溶液的酸度、校准试剂选择等实验条件方面对引起我国地表水自动监测站的高锰酸盐指数在线监测仪测定误差的原因进行了分析。由于高锰酸盐指数是一个条件性指标,实验条件对测定结果的影响较大,在线监测仪必须严格控制实验条件,其测定结果与手工方法才具有可比性。对仪器实验条件进行优化选择,对于保证高锰酸盐指数在线监测仪测定结果的准确性,更好地发挥水质自动站的预警监视作用有一定的指导意义。

The Cause of Measuring Bias and its Solving Methods of Permanganate Index Automatic Analyzer in Ground Water Automatic Monitoring Station

In this paper, the cause of measuring bias of the Permanganate Index Automatic Analyzer in the ground water automatic monitoring system, such as apparatus measuring range, temperature, heating time, solution acidity and calibration reagent are analysed. Permanganate Index is a conditional item, the measuring condition affect the result greatly. the user must control the condition strictly, then the result can be relative to the manual method. Here we optimized the measuring condition. it can guide the user to get truly result, and the automatic system can function better when it monitors the water body.