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| 间羧基苦胺酸偶氮变色酸与铜的显色反应研究 |
| Study on the Chromogenic Reaction of Cu(Ⅱ) with Picramazochrom-m- COOH |
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| DOI：10.3969/j.issn.1671-5322.2001.01.005 |
| 中文关键词: 间羧基苦胺酸偶氮变色酸 铜 光度法 铝合金 |
| 英文关键词: picramazochrom-m-COOH copper spetrophotometry aluminium alloy |
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| 中文摘要: |
| 在磷酸介质中,Cu2+离子与间羧基苦胺酸偶氮变色酸反应生成络合比为1:2的稳定蓝色络合物,该络合物在663 nm处有最大吸收,其摩尔吸光系数为2.88×104L·mol-1·cm-1,Cu2+离子含量在0～25μg/25ml范围内遵守比尔定律,方法用于铝合金中铜含量的测定,铜的标准回收率在95%～102%之间,结果满意. |
| 英文摘要: |
| In a medium of phosphoric acid, a stable blue complex if formed between copper(Ⅱ)ion and picramazochrom-m-COOH with its maxium absorption at 663 nm and apparent molar absorptivity of 2.88×104 L·mol-1·cm-1, the composition of the complex is detected to be mk: Cu(Ⅱ ) = 2 : 1. Beer’ law is obeyed in the concentration range o f 1 - 25 μg/25 ml of Cu(Ⅱ). This method has been applied to the determination of copper(Ⅱ) in aluminium alloys with a satisfactory result of a standard recovery of 95%-102%. |
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