| 催化褪色光度法测定痕量亚硝酸根 |
| |
| 引用本文： | 訾言勤,吴科峰.催化褪色光度法测定痕量亚硝酸根[J].理化检验(化学分册),2005,41(5):308-310. |
| |
| 作者姓名： | 訾言勤 吴科峰 |
| |
| 作者单位： | 淮北煤炭师范学院,化学系,淮北,235000;淮北煤炭师范学院,化学系,淮北,235000 |
| |
| 基金项目： | 安徽省科技厅重点项目(01023030)，淮北市科技局科研项目。 |
| |
| 摘 要： | 用吸收光谱法研究了在磷酸介质中，亚硝酸根催化甲基绿被溴酸钾氧化而褪色的反应。在紫外可见光谱区，甲基绿的三个吸收峰出现在632．6，421．4和313．4nm。根据亚硝酸根的催化褪色反应在632．6nm产生的吸光度差或在三个吸收峰产生的吸光度差的总和，与亚硝酸根的浓度呈线性关系，建立了催化褪色光度法测定痕量亚硝酸盐的方法。
|
| 关 键 词： | 催化褪色 光度法 亚硝酸盐 甲基绿 溴酸盐 |
| 文章编号： | 1001-4020(2005)05-0308-03 |
| 修稿时间： | 2004年4月17日 |
CATALYTIC DECOLORATION PHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF NITRITE |
| |
| ZI Yan-qin,WU Ke-fong.CATALYTIC DECOLORATION PHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF NITRITE[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2005,41(5):308-310. |
| |
| Authors: | ZI Yan-qin WU Ke-fong |
| |
| Abstract: | Using absorption photometry the decoloration reaction of methyl green oxidized with bromate, which was catalyzed by nitrite, was studied. There are three absorption peaks in the UV-VIS region, namely at 632.6, 421.4 and 313.4 nm. A catalytic decoloration photometric method for the determination of trace amount of nitrite was established on the basis of experimental results that the absorbance difference at 632.6 nm resulted from catalytic decoloration, or the sum of the three absorbance differences at 632.6, 421.4 and 313.4 nm resulted from decoloration, was proportional to the nitrite concentration. |
| |
| Keywords: | Catalytic decoloration Photometry Nitrite Methyl green Bromate |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
