| 靛蓝二磺酸钠催化光度法测定水中痕量亚硝酸根 |
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| 引用本文： | 白林山,张艳,张建铎,徐雁玲.靛蓝二磺酸钠催化光度法测定水中痕量亚硝酸根[J].安徽工业大学学报,2000,17(1):24-26,30. |
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| 作者姓名： | 白林山 张艳 张建铎 徐雁玲 |
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| 作者单位： | 华东冶金学院化学工程系,安徽马鞍山241002 |
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| 摘 要： | 基于亚硝酸根对溴酸钾氧化靛蓝二磺酸钠退色反应的催化作用,建立了一种在室温条件下(25℃)测定水中痕量亚硝酸根的方法.在608nm处,亚硝酸根含量在0.2～1.6 μg/10mL范围内与靛蓝二磺酸钠吸光度的减小值(△A)呈线性关系,检测限为0.02μg/mL.大多数常见离子无干扰.由Arrhenius方程求得表现活化能为39.7 kJ/mol.本方法简便快速,用于环境水样中痕量亚硝酸根的测定,结果满意.
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| 关 键 词： | 亚硝酸根 靛蓝二磺酸钠 催化光度法 |
| 文章编号： | 1000-2170(2000)01-0024-03 |
| 修稿时间： | 1999-05-27 |
Kinetic spectrophotometric determination of trace nitrite in water samples with indigo carmine and potassium bromate redox system |
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| BAI Lin-shan,ZhANG Yan,ZHANG Jian-feng,XU Yan-ling.Kinetic spectrophotometric determination of trace nitrite in water samples with indigo carmine and potassium bromate redox system[J].Journal of Anhui University of Technology,2000,17(1):24-26,30. |
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| Authors: | BAI Lin-shan ZhANG Yan ZHANG Jian-feng XU Yan-ling |
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| Affiliation: | BAI Lin -shan
,ZhANG Yan
,ZHANG Jian -feng
,XU Yan- ling
(Chemical Engineering Department ofECUM, Ma'anshan, 243002, China) |
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| Abstract: | A sensitive and selective kinetic spectrophotometric method for the determination of trace nitrite at25t was developed, based on its catalytic effect on the oxidation of indigo carmine with potassium bromate in1. 0 mol/L phosphoric acid medium. The linear calibration range and detection limit is 0. 2 ~ 1. 6 ug/ 10 mLand 0. 02 ug/mL respectively. The apparent activation energy of the quasi zero order catalytic reaction is39. 7 kJ/mol. The method is simple and rapid. Most of the common ions did not interfere to the determination of nitrite. The method is applied to the determination of nitrite in water samples with satisfactory results. |
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| Keywords: | nitrite Indigo carmine kinetic spectrophotometry |
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