改进的重铬酸盐法测定高盐废水化学需氧量

摘要

在重铬酸盐法基础上建立了一种无汞，以与被测水样等氯离子浓度的蒸馏水做为空白，测定高盐废水COD的方法。经验证该方法具有操作简单、结果准确、精密度高的特点，且可减少环境二次污染。%A method of determination of CODcr in high salinity wastewater had been established, based on the dichromate method. In this method ,we chose the pure water which has the same chloride ion concentration with the sample water as the blank.,not added mercury. The method has the advantages of simple operation, accurate result and high precision, and can reduce the environmental pollu⁃tion .