| 离子交换树脂相光度法测定蒙药中微量铁 |
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| 引用本文： | 峰山,石东辉. 离子交换树脂相光度法测定蒙药中微量铁[J]. 光谱实验室, 2010, 27(2): 477-480 |
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| 作者姓名： | 峰山 石东辉 |
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| 作者单位： | 上海市医药股份有限公司沪西分公司,上海市胶州路58号六楼,200040;上海市立达职业技术学院护理系,上海市车事公路1788号,201690 |
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| 摘 要： | 铁(Ⅱ)与2,2′-联吡啶在pH值5左右的HAc-NaAc缓冲溶液中生成有色络阳离子,与强酸性阳离子交换树脂交换吸附,可进行树脂相分光光度法测定痕量Fe(Ⅱ)。最大吸收波长λmax=522nm,表观摩尔吸光系数k=9.12×104L.mol-1.cm-1,比水相中直接分光光度法测定Fe(Ⅱ)的摩尔吸光系数(k=8.23×103L.mol-1.cm-1)提高11倍多。铁(Ⅱ)的含量在0—1.5mg.L-1范围内符合Beer定律。用此法测定蒙药苏斯-12中的微量铁,相对标准偏差为2.3%,回收率在98.4%—100.3%之间。
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| 关 键 词： | 离子交换树脂 分光光度法 2 2’-联吡啶 铁 |
Determination of Trace Iron in Mongolian Medicine by Ion Exchange Resin Phase Spectrophotometry |
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| Feng Shan,Shi Dong-Hui. Determination of Trace Iron in Mongolian Medicine by Ion Exchange Resin Phase Spectrophotometry[J]. Chinese Journal of Spectroscopy Laboratory, 2010, 27(2): 477-480 |
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| Authors: | Feng Shan Shi Dong-Hui |
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| Affiliation: | Huxi Branch Company of Shanghai Pharmaceutical Co.;Ltd.;Shanghai 200040;P.R.China;Department of Nursing;Lida Vocational & Technical College;Shanghai 201690;P.R.China |
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| Abstract: | Under the buffer medium of HAc-NaAc pH=5,Fe(Ⅱ) and 2,2'-bipyridine formed a colored complex which can be quantitatively absorbed on the strong acidic cation exchange resin, and the amount of trace Fe (Ⅱ) was determined by spectrophotometry.The maximum absorption wavelength is at 522 nm,the apparent molar absorptivity is 9.12 × 10~4L · mol~(-1) · cm~(-1) ,which is about 11 times than water phase method.The Beer's law is obeyed in the range of 0-1.5mg · L~(-1)for Fe(Ⅱ).The proposed method has been applied to the determination of trace Fe(Ⅱ) in Mongolian medicine Hasu-12 with satisfactory results.The relative standard deviation is 2.3% and recovery is 98.4 %-100.3 %, respectively. |
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| Keywords: | Ion Exchange Resin Spectrophotometry 2 2'-Bipyridine Iron |
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