| 偶氮氯磷Ⅲ吸光光度法测定工业碳酸锂中微量钙 |
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| 引用本文： | 陈华萍 黄乾明. 偶氮氯磷Ⅲ吸光光度法测定工业碳酸锂中微量钙[J]. 四川农业大学学报, 1997, 15(4): 517-519 |
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| 作者姓名： | 陈华萍 黄乾明 |
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| 作者单位： | 四川农业大学基础部 |
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| 摘 要： | 研究了工业碳酸锂中微量钙的测定方法。采用偶氮氯磷Ⅲ［２，７－双－（４－氯─２－膦苯偶氮）－１，８－二羟基苯酚－３，６－二磺酸］作显色剂，在ｐＨ＝２．３─２．７条件下，钙离子与偶氮氯磷Ⅲ生成水溶性蓝色配合物，最适测定波长为λ＝６５８ｎｍ，摩尔吸光系数ε＝３．１×１０４，有色溶液稳定６小时，钙含量在０─１μｇ／ｍＬ范围内服从比耳定律。该显色剂用于工业碳酸锂中微量钙的测定与原子吸收法相比较，结果一致。
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| 关 键 词： | 偶氮氯磷Ⅲ 吸光光度法测定 工业碳酸锂 微量钙 |
ABSORPTIOPHOTOMETRIC MICRO-ANALYSIS OF CALCIUM IN INDUSTRIAL LITHIUM CARBONATE WITH CHLOROPHOSPHORAZO Ⅲ AS A CHROMOGENIC REAGENT |
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| Chen Huaping,Huang Qianming. ABSORPTIOPHOTOMETRIC MICRO-ANALYSIS OF CALCIUM IN INDUSTRIAL LITHIUM CARBONATE WITH CHLOROPHOSPHORAZO Ⅲ AS A CHROMOGENIC REAGENT[J]. Journal of Sichuan Agricultural University, 1997, 15(4): 517-519 |
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| Authors: | Chen Huaping Huang Qianming |
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| Abstract: | A method has been studied for the determination of microamounts of calcium in industrial lithium carbonate, In the pH 2.3-2.7 region,chlorophosphonazo Ⅲ as a color reagent and calcium ion give a watersolubility blue co-ordination compound. The Most applicable wave length λ for determination is 658nm, and the Molar absorptivity ε is 3.1×10 4,The colored solution can be steadied for 6 hours, Beer's law is obeyed when Ca2+ concentration is in the range of 0 to 1 μg/mL, It's the same result that the method is compared with AAS. |
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| Keywords: | CHLOROPHOSPHONAZO Ⅲ ABSORPTIOPHTOMETRIC DETERMINATION INDUSTRIAL LITHIUM CARBONATE MICROAMOUNTS OF CALCIUM. |
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