测定总氮时应注意的几个问题

在利用<碱性过硫酸钾消解紫外分光光度法>(GB11894-89)测定水中总氮时,虽然步骤较为简单,但实验条件要求较为苛刻,准确度不宜把握,任何一处细节出现偏差,都会使空白值偏高,从而对测量结果产生影响.在此提出了几个关键性的问题及一些改进措施,从而可将空白值控制在较为理想的范围内,达到了环境监测的要求.

Several Questions That Should Be Paid Attention To While Determining The Total Nitrogen

In utilize getting " alkaline to pass sulphuric acid potassium clear up purple outside divide all luminosity law " at determining total nitrogen among the water, though the step is comparatively simple, the experiment condition demands to be comparatively harsh, the assurance that accuracy should not, the detail appear deviation, will make blank on the high side value, thus to measure result exert an influence. So, this text has put forward several key questions and some improvement measures, thus can control blank value in the comparatively ideal range , meet the requirement of environmental monitoring.