| 光度法快速测定铜合金中微量铝 |
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| 引用本文： | 钟国秀,黄清华. 光度法快速测定铜合金中微量铝[J]. 化学分析计量, 2011, 20(5): 60-62 |
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| 作者姓名： | 钟国秀 黄清华 |
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| 作者单位： | 1. 湖北省机电研究设计院,武汉,430070
2. 湖北省建材研究设计院,武汉,430071 |
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| 摘 要： | 在pH 4-6的六次甲基四胺介质中,显色剂偶氮氯膦I与铝形成稳定的蓝紫色络合物.讨论了吸收光谱、酸度、试剂用量、干扰离子等因素对实验的影响,确定了反应的最佳条件.铝含量在0-25μg/(50 mL )范围内符合比耳定律,铝络合物在600 nm处有最大吸收,表观摩尔吸光系数为3.9×104L/(mol·cm).用EDTA...
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| 关 键 词： | 铝 偶氮氯膦Ⅰ 铜合金 光度法 |
RAPID DETERMINATION OF TRACE ALUMINUM IN COPPER ALLOYS |
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| Zhong Guoxiu,Huang Qinghua. RAPID DETERMINATION OF TRACE ALUMINUM IN COPPER ALLOYS[J]. Chemical Analysis And Meterage, 2011, 20(5): 60-62 |
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| Authors: | Zhong Guoxiu Huang Qinghua |
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| Affiliation: | Zhong Guoxiu (Hubei Reserch ＆ Designing Institute of Mechanical Electronic Engineering, Wuhan 430070, China) Huang Qinghua (Hubei Reserch ＆ Designing Institute of Building Material, Wuhan 430071, China) |
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| Abstract: | In hexamethylenetetramine medium pH 4 - 6, aluminum reacts with chlorophosphonazo I to form a blue - violet complex which exhibits an absorption maximum at 600 nm with a apparent molar absorptivity of 3.9 x 104 L/（ mol · cm）. The absorp- tion spectra, acidity, reagent dosage, interfering ions and other factors were discussed, and the experimental conditions were opti- mized. Beer＇s law was obeyed in the range of 0 -25 p,g/（50 mL） for aluminum with EDTA -Mn as a masking agent. Coexisting ele-ments didn＇t interfere with the determination, the method had good selectivity. The proposed method can be applied to determine alu- minum directly in copper alloy, and the RSD was less than 2% （ n = 5 ）. The determination results were corresponded with the certified values. |
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| Keywords: | aluminum CPA I copper alloy spectrophotometry |
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