紫外分光光度法和离子色谱法测定水中硝酸盐氮的比对分析  

Comparative Analysis and Determination of Nitrate Nitrogen in Water by Ultraviolet Spectroscopy and Ion Chromatography

作　　者：苗俊 Miao Jun(Pinglu Branch of Shuozhou Ecological Environment Bureau,Shuozhou Shanxi 036800,China)

机构地区：[1]朔州市生态环境局平鲁分局,山西朔州036800

出　　处：《山西化工》2024年第10期89-90,104,共3页Shanxi Chemical Industry

摘　　要：本文通过紫外分光光度法和离子色谱法测定水中硝酸盐氮的含量,分别就取样量、检测时间、标准曲线、精密度、准确度等参数进行比对分析。结果显示,离子色谱法较紫外分光光度法所需的试样量少,而紫外分光光度法较离子色谱法分析时间短;同时,离子色谱法可同时测定多种无机阴离子;两种方法的标准曲线相关系数均大于0.999,回归方程均具有良好的线性关系;相对标准偏差分别为1.6%、0.5%,加标回收率分别为92.0%~102%、94.0%~110%,均满足质控要求。This article uses UV spectrophotometry and ion chromatography to determine the content of nitrate nitrogen in water,and compares and analyzes parameters such as sampling amount,detection time,standard curve,precision,and accuracy.The results showed that ion chromatography requires less sample size than ultraviolet spectrophotometry,while ultraviolet spectrophotometry has a shorter analysis time than ion chromatography;Meanwhile,ion chromatography can simultaneously measure multiple inorganic anions.The correlation coefficients of the standard curves for both methods are greater than 0.999,and the regression equations have a good linear relationship.The relative standard deviations are 1.6%and 0.5%,respectively,and the spiked recovery rates are 92.0%~102%and 94.0%~110%,respectively,all of which meet the quality control requirements.

关 键 词：硝酸盐氮 水质监测 紫外分光光度法 离子色谱法 

分 类 号：O657.1[理学—分析化学]