| 分光光度法测定球形氢氧化镍中微量钴 |
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| 引用本文： | 杨浩义,钟国秀,晏高华.分光光度法测定球形氢氧化镍中微量钴[J].电池工业,2010,15(4):195-196. |
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| 作者姓名： | 杨浩义 钟国秀 晏高华 |
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| 作者单位： | 湖北省机电研究设计院,湖北武汉,430070;湖北省机电研究设计院,湖北武汉,430070;湖北省机电研究设计院,湖北武汉,430070 |
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| 基金项目： | 杨浩义（1963-）,男,湖北省人,高级工程师;主要从事金属材料分析检测. |
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| 摘 要： | 研究了显色剂苦氨酸偶氮变色酸与钴的显色反应。pH10的柠檬酸铵-氨水溶液中,钴与苦氨酸偶氮变色酸反应形成绿色配合物,最大吸收波长650 nm,表观摩尔吸光系数2.7×104 L/mol.cm。25 mL溶液中,钴量在0～50μg范围内符合比尔定律。方法用于球形氢氧化镍中微量钴的直接测定,相对标准偏差小于5%,标准加入回收率99%～101%。
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| 关 键 词： | 钴 苦氨酸偶氮变色酸 球形氢氧化镍 分光光度法 |
Spectrophotometry determination of cobalt in spherical nickel hydroxide |
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| YANG Hao-yi,ZHONG Guo-xiu,YAN Gao-hua.Spectrophotometry determination of cobalt in spherical nickel hydroxide[J].Chinese Battery Industry,2010,15(4):195-196. |
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| Authors: | YANG Hao-yi ZHONG Guo-xiu YAN Gao-hua |
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| Affiliation: | (Hubei Research ＆ Designing Institute of Mechanical Electronic Engineering,Wuhan,Hubei 430070,China) |
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| Abstract: | The chromogenic reaction between the reagent picramazochrom and cobalt was studied.In medium,cobalt reacted with the reagent to form a green complex which exhibited an absorption maximum at 650 nm with a apparent molar absorptivity of 2.7×104 L/mol.cm.Beer＇s law was obeyed in the range of 0~50 μg/25 mL for cobalt.The proposed method was applied to determine cobalt directly in spherical nickel hydroxide of the RSD（n=5） between 0.8% and 1.6%,and the recovery was 99%～101%. |
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| Keywords: | cobalt picramazochrom spherical nickel hydroxide spectrophotometry |
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