| 引用本文： |
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高明雄,文桂明.硫氰酸钾—吐温80光度法测定铁[J].广西科学院学报,1989,(2):45-51. [点击复制]
- Gao MingXiong,Wen GuiMing.SPECTRO PHOTOMETRIC DETERMINATION OF IRON BY POTASSIUM SUL FOCYAN ATE WITH TWEEN-80[J].Journal of Guangxi Academy of Sciences,1989,(2):45-51. [点击复制]
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| 摘要: |
| 硫氰酸盐光度法测定铁的最大缺点是随着反应的SCN-浓度的不同而分级络合,随着SCN-浓度的增大,生成颜色愈来愈深的高配位数络合物Fe(SCN)4-、Fe(SCN)52,溶液的颜色由橙黄变为血红色。因此,只有严格控制显色剂的用量,才能得到准确的结果[1],而且Fe(Ⅲ)易被硫氰酸或分解产物还原,故,重现性差,稳定性也不好,一般10分钟就退色10%[2]。 |
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| DOI： |
| 投稿时间：1988-07-12 |
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| SPECTRO PHOTOMETRIC DETERMINATION OF IRON BY POTASSIUM SUL FOCYAN ATE WITH TWEEN-80 |
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Gao MingXiong, Wen GuiMing
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| (Department of Chemistry, Guangxi University, Nanning) |
| Abstract: |
| A method of spectrophotometric determination of iron with potassium sulfocyanate in the presence of non-ionic surfactants Tween-80 was invertigated. In a pH range from 1.0 to 4.0 iron can form a stable complex with potassium sulfocyanate in the presence of Tween 80 exhibiting maxinaum absorption at 480nm.Beer's law is obeyed up to concentration of 30mg/25m/of iron. |
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