影响总氮空白值高的主要因素分析  

Analysis of the main factors affecting the high blank value of total nitrogen

作　　者：乔欢欢 李健 

机构地区：[1]河南省三门峡市环境监测站,三门峡472000 [2]河南省三门峡市环保局,三门峡472000

出　　处：《环境与发展》2014年第1期177-178,共2页Environment & Development

摘　　要：总氮是衡量水体富营养化程度的重要指标之一。水质总氮的国标测定方法是碱性过硫酸钾消解紫外分光光度法(GB 11894-89)。但是依据该方法测定水质时经常出现空白值偏高。针对上述问题,从以下几个方而来分析:实验用水、试剂及配制方法、消解时间、分析室环境条件、玻璃器皿的洗涤。结果选用新鲜的的去离子水,(1+9)HCl浸泡的玻璃器皿和提纯过的K2SO4,消解时问为50min条件下测得结果的空白吸光值为最优条件。Total nitrogen was one of the important indicators in measuring the extent of water eutrophication. GB method for the determination of the total nitrogen in water was the alkaline potassium persulfate digestion UV spectrophotometrie method（ GB11894 — 89 ）. However , using the method to test the content of total nitrogen always got a high blank value. The above problems were analyzed from the experimental water, reagents and preparing method,digestion time, analysis rooms environmental conditions , glassware washing , The optimal condition is using ultra water, immersing the glassware in （ 1 ＋9） HC1, purity of K2SO4, 50mins dispel time.

关 键 词：总氮 空白值 过硫酸钾 

分 类 号：X83[环境科学与工程—环境工程]