| 淀粉—KI体系光度法测定微量铜(Ⅱ)的研究 |
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| 引用本文： | 余荣珍,马俊义. 淀粉—KI体系光度法测定微量铜(Ⅱ)的研究[J]. 信阳农业高等专科学校学报, 1992, 0(2) |
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| 作者姓名： | 余荣珍 马俊义 |
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| 摘 要： | 本文利用碘与淀粉的高灵敏显色反应,建立了光度法测定微量钢(Ⅱ)的新分析方法。该法简单易行,灵敏准确。C_U~(2+)离子浓度在1.0×10~(-6)mol·L~(-1)～6.0×10~(-5)mol·L~(-1)区间符合比耳定律,检测限为5×10~(-7)mol·L~(-1)。对水样中微量铜(Ⅱ)的测定,回收率在98.2～99.6％之间变化,RSD为2.2％和2.5％。
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| 关 键 词： | 淀粉 KI 分光光度法 铜 |
Study of Spectrophtoraefric Determination ofMicro——Amount of Copper (Ⅱ) with Starch and Iodine System |
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| Yu RongZhen Ma Junyi. Study of Spectrophtoraefric Determination ofMicro——Amount of Copper (Ⅱ) with Starch and Iodine System[J]. Journal of Xinyang Agricultural College, 1992, 0(2) |
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| Authors: | Yu RongZhen Ma Junyi |
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| Affiliation: | Yu RongZhen Ma Junyi |
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| Abstract: | A new method of determination of micro-amount of Cu (Ⅱ) withs pectrophotometry has been established.The method is based on a high sensitive colour reaction of I2 and starch. It is simple and easy to operate Beer's law is obeyed in the concentration range of 1.0×1018-6.0×10-5mol . L-1 far Cu (Ⅱ). The recovery is from 98.2% to 99.6% and thd RSD is 2.2% and 2.5% when this method is used for the determination of micro-amount of Cu (Ⅱ) in water samples. |
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| Keywords: | Starch Potassium iodide Spectrophofometry Copper |
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