哈希DR2500分光光度计测定水中COD的分析性能浅析

A Preliminary Discussion on COD Measuring Function of HACH DR2500 Spectrophotometer

摘要用哈希DR2500分光光度计测定水中COD，操作简单，方便，但在实际应用中还存在着一些技术问题。文章从消解液量程，空白以及比色方向这三方面对其分析性能进行了探讨，提出了一些提高仪器测定精密度和准确度的办法。结果表明。在正确掌握了其分析性能的基础上，用DR2500分光光度计测定水中COD可以得到较准确的分析结果。

Abstract It is easy to measure COD in water by using HACH DR2500 Spectrophotometer, but there are some technical problems in practice. Its analytical function was discussed in respect of digesting solution range, blank and colorimetric direction, and some ways to improve the instrumentation precision and accuracy were presented. It was shown that analytical results of COD in water by using DR2500 spectrophotometer could be satisfactory when its function had correctly been brought into play.