| 引用本文： |
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唐宁莉,陈永和,程辉.Fe(Ⅲ)-BPR-CPB-PVA显色反应的研究及应用[J].广西科学,2000,7(4):270-271,274. [点击复制]
- Tang Ningli,Chen Yonghe,Cheng Hui.Study and Application of the Colour Reaction of Iron(Ⅲ) BPR CPB PVA[J].Guangxi Sciences,2000,7(4):270-271,274. [点击复制]
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| 摘要: |
| 研究在溴化十六烷基吡啶(CPB)和聚乙烯醇(PVA)混和表面活性剂存在下,Fe(Ⅲ)与溴邻苯三酚红(BPR)的显色反应条件。结果表明,在pH值=4.0的醋酸醋酸钠缓冲溶液中,Fe(Ⅲ)与BPR生成的有色配合物的最大吸收波长为640nm,表观摩尔吸光系数ε=5.33×104L·mol-1·cm-1,Fe(Ⅲ)浓度在0μg/L~800μg/L范围内符合比耳定律。据此拟定的分析方法用于水样、发样和某些化学试剂中微量铁的测定,获得满意结果。 |
| 关键词: 铁 溴邻苯三酚红 溴化十六烷基吡啶 聚乙烯醇 分光光度法 |
| DOI： |
| 投稿时间：2000-03-27修订日期：2000-06-15 |
| 基金项目: |
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| Study and Application of the Colour Reaction of Iron(Ⅲ) BPR CPB PVA |
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Tang Ningli, Chen Yonghe, Cheng Hui
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| (Dept. of Material Eng., Guilin Institute of Tech. 12 Jianganlu, Guilin, Guangxi, 541004, China) |
| Abstract: |
| In pH=4.0 HAc-NaAc buffer solution,iron(Ⅲ) reacts with bromopyrogallol red to produce a colour complex in the presence of polyvinyl alcohol (PVA) and cetyl pyridinium bromide (CPB). The complex's maximum absorption wavelength is at 640 nm. The molar absorptivity is 5.33×104 L·mol-1·cm-1.The Beer's law is obeyed for iron(Ⅲ) in the range of 0 to 800 μg/L. The method has been applied to the determination of micro iron in water,human hair and some chemical reagents with satisfactory results. |
| Key words: iron bromopyrogallol red cetyl pyridinium bromide polyvinyl alcohol spectrophotometry |
