摘要
在酸性条件下，用二阶导数及零交技术，取２２３．５ｎｍ处的导数值可消除水中常见离子的干扰．该法的线性范围为０—１３０μｇ／５０ｍｌ，检出限为０．０８μｇ·ｍｌ－１，加标回收率在９５％—１０１％之间，适用于自来水。
In the presence of sulphuric acid,interferences such as NO - 2,HCO - 3,CO 2- 3 etc. can be eliminated by the Zero cross technique.Beer's law is obeyed in the range of 0—130μg/50ml,and the limit of detection is 0.08μg·ml -1 .The recovery is range of 95%—101%.The method was applied to the determination of nitrate content in the drinking water with satisfactory results.
出处
《环境科学》
EI
CAS
CSCD
北大核心
1999年第1期98-99,共2页
Environmental Science
关键词
分光光度法
硝酸根
饮用水
水质监测
Ultraviolet second derivative spectrophotometry,nitrate content,drinking water,direct determination.
