摘要：

首次将复合消解液这一概念引入COD测定中,并用自配的复合消解液进行了密封法测定COD的研究。结果表明该方法能够减少操作步骤,减轻分析人员的劳动强度;具有优异的抗氯离子干扰能力；测定标准溶液的相对误差为-2.38%~1.20%,相对标准偏差为1.02%～4.68%;与标准回流法有良好的相关性。

关键词: 化学需氧量, 密封法, 复合消解液

Abstract:

The conception of complex digestive solution is introduced to COD determination the first time and sealing method is used to determine COD by using self-made complex digestive solution. The experimental result shows that the operating steps are reduced and labour intensity of analysts is lightened, as well as superior resistance to chloride interference is obtained by using this method. The relative error of the standard solution is -2.38% ~ 1.20% and the relative standard deviation is 1.02% ~ 4.68%.This method has a perfect relativity with standard reflux method.

Key words: chemical oxygen demand, sealing method, complex digestive solution

中图分类号: 

• TU991.21