|
|||||
|
|
| 新苯并噻唑偶氮类显色剂BTAR光度法测定微量铁 | |
| 引用本文： | 范志宏,郭安城,郭晓宇.新苯并噻唑偶氮类显色剂BTAR光度法测定微量铁[J].现代科学仪器,2009(6):74-76. |
| 作者姓名： | 范志宏 郭安城 郭晓宇 |
| 作者单位： | 1. 山西农业大学文理学院,山西,太谷,030801 2. 山西大学化学化工学院,山西太原,050006 3. 山西农业大学林学院,山西太谷,030801 |
| 基金项目： | 山西农业大学科技创新项目 |
| 摘 要： | 研究了新显色剂5-（6-溴苯并噻唑-2-偶氮）-2，6-二羟基苯甲酸（BTAB）与铁的显色反应及高纯石英砂中微量铁的测定。在pH=6．2的醋酸盐缓冲体系和溴代十六烷基吡啶溶液（CPB）存在下，BTAB与Fe（11）形成1：2的红色配合物，在566．0nm处有最大吸收，稳定常数为5．10×10^9,摩尔吸光系数为1．185×10^4L／（mol·cm），铁含量在0～2．54μg／mL内符合朗伯-比耳定律，建立了一种新的Fe（II）的测定方法。反应有很好的选择性。不经分离、掩蔽可直接测定高纯石英砂中微量铁。 |
| 关 键 词： | 微量铁 分光光度分析 5-(6-溴苯并噻唑-2-偶氮)-2 6-二羟基苯甲酸 高纯石英砂 |
Spectrophotometric Determination of Trace Fe by New Benzothiazole Reagent BTAB |
|
| Fan Zhihong,Guo Ancheng,Guo Xiaoyu.Spectrophotometric Determination of Trace Fe by New Benzothiazole Reagent BTAB[J].Modern Scientific Instruments,2009(6):74-76. | |
| Authors: | Fan Zhihong Guo Ancheng Guo Xiaoyu |
| Affiliation: | Fan Zhihong,Guo Ancheng,Guo Xiaoyu (1College of science and art, Shanxi agricultural university, Taigu, 030801, China; 2College of Chemistry ＆ Chemical Engineering, Shanxi university, Taiyuan, 030006, China; 3 Shanxi agricultural university Forestry Academy, Taigu, 030801, China) |
| Abstract: | The highly sensitive and selective color reaction of a new benzothiazole reagent 3-（6-bromobenzole-2-azo）- 2,6-dihydroxy benzoic acid （BTAB） with Fe（II） and trace Fe determination in high purity quartz sand has been studied. The result show that in the presence of CPB and at pH=6.2 the reagent reacts with Fe（II） to form a red complex with a molar ratio of 2：1. Its apparent molar absorptivity is 1.183×10^4L/（mol.cm） and its maximum absorption wave-length is 566.0nm,stability constant is 5.10×10^9. Beer＇s law is obeyed in the range of 0D2.54μg/mL. The method has been used for the determination of trace iron in high purity quartz sand with satisfactory results. |
| Keywords: | Trace Fe Spectrophotometry 3-（6-bromobenzole-2-azo）-2 6-dihydroxy benzoic acid High purity quartz sand |
| 本文献已被 维普 万方数据 等数据库收录！ | |