高锰酸盐指数水质自动分析仪抗浊度干扰技术研究

Study on Anti-Turbidity Interference Technology of Permanganate Index Water Quality Automatic Analyzer

针对高锰酸盐指数水质自动分析仪测定浑浊水体出现吸光度偏高的问题,通过增加一路880 nm光路比色系统进行浊度补偿,解决了高锰酸盐指数标液测定结果随浊度升高而不断增高的问题。通过实际水样实验室比对,示值误差保持在±10%以内,加标回收率满足90%~110%,符合技术要求。

Aiming at the problem of high absorbance in the determination of turbid water body by permanganate index water quality automatic analyzer,a 880 nm optical path colorimetric system is added for turbidity compensation,which solves the problem that the determination result of permanganate index standard solution increases with the increase of turbidity.Through the laboratory comparison of actual water samples,the indication error is kept within±10%,and the recovery rate of standard addition meets 90%~110%,meeting the technical requirements.