溶解氧采样误差对监测值的影响分析

Analysis of Influence by sampling error to dissolved oxygen monitoring value

本文针对当前溶解氧采样过程存在一个气体与液体空间交换的过程,可能使取得的水样溶解氧含量增加,即存在溶解氧采样误差,通过改进采样方法的平行试验对比分析,在分析多组平行样本的基础上,通过误差分析得出当前溶解氧采样方法对分析参数存在影响,并初步确定了影响范围,为今后水环境分析、评价工作提供有益的帮助。

There is a special exchanging process of dissolved oxygen between gas and liquid in taking a sample. It could increase the content of dissolved oxygen in water sample, which causes the error of sample. The influ- ence of sampling method on analysis parameters is obtained through error analysis based on the comparative anal- ysis of multi-group samples and parallel tests of improving the sampling method. The influence scope is deter- mined primarily. This will provide useful help for analysis and evaluation of water environment.