| 硫氰酸钾-邻菲啰啉-吐温-20分光光度法测定植物中的铁 |
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| 引用本文： | 何斌.硫氰酸钾-邻菲啰啉-吐温-20分光光度法测定植物中的铁[J].植物营养与肥料学报,1997,3(1):66. |
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| 作者姓名： | 何斌 |
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| 作者单位： | 广西农业大学林学院 南宁;530001 |
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| 摘 要： | 本文研究了在吐温-20存在下，于硝酸介质中，铁（Ⅲ）与硫氰酸钾和邻菲啉的显色反应房件。结果表明，所形成的红色配合物的最大吸收波长为518nm，表观摩尔吸光系数为2.06×104L·mol-1·cm-1，铁（Ⅲ）含量在0～50μg范围内服从比耳定律。本法具有操作简便，选择性高，重复性好等优点，可不经分离和掩蔽，直接用于植物中铁的测定，结果满意。
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| 关 键 词： | 铁测定 硫氰酸钾 邻菲啰啉 吐温-20 植物 分光光度法 铁测定 硫氰酸钾 邻菲啰啉 吐温-20 植物 分光光度法 |
SPECTROPHOTOMETRIC DETERMINATION OF IRON IN PLANT WITH POTASSIUM THIOCYANATE AND 1,10-PHENANTHROLINE IN THE PRESENCE OF TWEEN-20 |
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| He Bin.SPECTROPHOTOMETRIC DETERMINATION OF IRON IN PLANT WITH POTASSIUM THIOCYANATE AND 1,10-PHENANTHROLINE IN THE PRESENCE OF TWEEN-20[J].Plant Nutrition and Fertilizer Science,1997,3(1):66. |
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| Authors: | He Bin |
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| Institution: | Forestry College. Guangxi Agric Univ. Nanning 530001 |
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| Abstract: | It is reported that iron(Ⅲ) forms a red complex with potassium thiocyanate and 1,10-phenanthroilne in the presence of Tween-20 and in nitric acid solution. The absorption maximum wavelength of the complex is 518nm. and it's apparent mole absorptivity is 2. 06× 104 L· mol-1· cm-1. Beer's law is obeyed for iron in the range of 0-50μ g/25mL,correlation coefficient is 0. 9999. The advantages of this method are simple operation. less time-consuming. high selectivity and repeatability. It has been applied to determine iron in plant with satisfactory results, without the need for preliminary separation and masking steps. |
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