安徽农业科学2011，Vol.39Issue(34)：21268-21269,2.
COD对硝酸盐氮分析结果的影响
The Influence of COD on the Analysis Results of Nitrate Nitrogen
张欣欣 1吴建华 1熊芳芳 1冯慧桃 1马三剑1
作者信息
- 1. 苏州科技学院环保应用技术研究所,江苏苏州 215011
- 折叠
摘要
Abstract
[Objective] The aim was to study the changes of absorbance of nitrate nitrogen under different concentrations of COD. [ Method] The concentration of nitrate nitrogen in the standard solution was measured by using ultraviolet spectrophotometry, and the effects of seven organic substances with various COD concentrations on the absorbance of nitrate nitrogen were analysed. [Result] When the COD concentration of glucose, methanol and ether reached 15 000, 20 000 and 15 000 mg/L respectively, there was no obvious influence on the absorbance of nitrate nitrogen. Meanwhile, while the COD concentration of formaldehyde, benzene and acetic acid reached 75 000, 16 000 and 7 500 mg/L respectively, the absorbance of nitrate nitrogen increased by five times, one times and eight times respectively. In addition, when the COD concentration of acetone was up to 10 000 mg/L, the absorbance of nitrate nitrogen decreased by 14 times. Therefore, ultraviolet spectrophotometry , used in the detection of nitrate nitrogen in water sample with organic matter, was simple and rapid, but this method had a certain rang and limitation. [ Conclusion ] The study could provide references for the discussion on the feasibility of ultraviolet spectrophotometry in the determination of nitrate nitrogen concentration.关键词
COD/硝酸盐氮/吸光度/紫外分光光度法/干扰Key words
COD/ Nitrate nitrogen/ Absorbance/ Ultraviolet spectrophotometry/ Interference分类
资源环境引用本文复制引用
张欣欣,吴建华,熊芳芳,冯慧桃,马三剑..COD对硝酸盐氮分析结果的影响[J].安徽农业科学,2011,39(34):21268-21269,2.
