| 关于过硫酸钾氧化-紫外分光光度法测定水中总氮方法改进探讨 |
| |
| 引用本文： | 郑京平.关于过硫酸钾氧化-紫外分光光度法测定水中总氮方法改进探讨[J].光谱实验室,2011,28(1):210-217. |
| |
| 作者姓名： | 郑京平 |
| |
| 作者单位： | 福建省测试技术研究所; |
| |
| 摘 要： | 针对海水中总氮的测定较繁琐,中间过程长,干扰物质多,分析时间长,重现性差,提出了采用硼酸-氢氧化钠缓冲体系,通过控制溶液酸碱度,消除海水中钙、镁离子对测定的干扰,实现用碱性过硫酸钾氧化-紫外分光光度法直接测定海水中总氮含量.对于成分复杂,色度较高且铵氮含量较高的地表水,采取延长消解时间,降低溶液酸碱性来抑制氨氮挥发所造...
|
| 关 键 词： | 总氮 海水 钙离子 镁离子 消解时间 硼酸 |
Discussion on the Improvement of Determination of Total-Nitrogen in Water by Potassium Persulfate Oxidation-UV Spectrophotometry |
| |
| ZHENG Jing-Ping.Discussion on the Improvement of Determination of Total-Nitrogen in Water by Potassium Persulfate Oxidation-UV Spectrophotometry[J].Chinese Journal of Spectroscopy Laboratory,2011,28(1):210-217. |
| |
| Authors: | ZHENG Jing-Ping |
| |
| Institution: | ZHENG Jing-Ping(The Academy of Testing Technology of Fujian,Fuzhou 350003,P.R.China) |
| |
| Abstract: | The determination of total nitrogen in the seawater is a little difficult due to the long time course of analysis,and there are also many influences.Based on the boric acid-sodium hydroxide buffer system,by controlling the pH of the solution,the interference of Ca2+ and Mg2+ can be eliminated in method for the determination of the nitrogen in the seawater directly by Alkaline persulfate oxidation-UV spectrophotometry.Extending digestion time and reducing the alkaline were used to control the evaporation of ... |
| |
| Keywords: | Total Nitrogen Seawater Ca2 Mg2 Digestion Time Boric Acid |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
