碱性过硫酸钾法测定总氮常见问题与解决办法  

Alkaline Potassium Persulfate UV Spectrophotometric Determination of Total Nitrogen Frequently Asked Questions and Solutions

作　　者：孟宪春 朱春媛 陈学玲 

机构地区：[1]蓟县环境保护监测站,天津蓟县301900

出　　处：《环境科学与管理》2010年第5期126-128,共3页Environmental Science and Management

摘　　要：使用国标《碱性过硫酸钾氧化-紫外分光光度法》(GB11894-1989),测定地面水、地下水中的总氮时,在严格按该方法的原理,分析步骤操作的情况下,依然会出现空白值偏高、有时总氮测定值小于氨氮测定值的情况,而找不出问题的所在。本文参阅有关技术资料并根据工作实际经验,对碱性过硫酸钾紫外分光光度法测定总氮常见问题进行了总结、分析和研究,找出了实验中出现问题的原因并进行了验证。While we used GB（ 11894 -1989）to determine the total nitrogen of surface water and groundwater with rigorous methods and step by step operation, blank value still appeared too high, sometimes the measured values of total nitrogen is less than ammonia nitrogen, but we were unable to find the problem. We referenced the relevant technical information and work experience in the article, using acidic potassium persulfate UV spectrophotometer to determine the frequent questions of the total nitrogen. Then we did the summary, analysis, research, we found the cause of problems identified and verified.

关 键 词：总氮测定 过硫酸钾 问题 办法 

分 类 号：X830.2[环境科学与工程—环境工程]