低浓度废水化学需氧量的测定方法比较

Determination of Cod_(Cr) in Low Concentration Wastewater with Photoelectric Colorimetry

比较了回流法和分光光度法测定低浓度废水化学需氧量(CODCr)的分析结果,在保证较高的准确度和精密度的前提条件下,后者能大量减少试剂用量,缩短分析时间。

This paper focuses on low concentration wastewater. The the feasibility of utilizing the photoelectric colorimetry to determine the COD_（Cr） of photoelectric colorimentry has better accuracy and precision, and it can greatly decrease the dosage of reagent. The results can be displayed directly without the titration or protracting criterion curve.