| 用共沉淀富集分离火焰原子吸收分光光度法测定饮水中的镍和钴 |
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| 引用本文： | 鞠美庭.用共沉淀富集分离火焰原子吸收分光光度法测定饮水中的镍和钴[J].中国石油大学学报(自然科学版),1999(2). |
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| 作者姓名： | 鞠美庭 |
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| 作者单位： | 石油大学炼制系,山东东营,257062 |
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| 摘 要： | 在中性或弱碱性条件下，向被测水样中加入适量Ｂｉ３＋和Ｎａ２Ｓ，使水样中的Ｎｉ２＋、Ｃｏ２＋和Ｂｉ３＋以硫化物的形式沉淀下来。将沉淀过滤，或者加入明矾以加速硫化物的沉降、凝结，再用虹吸法吸去上层清液（无须过滤）的方法将沉淀分离，用热稀硝酸将沉淀溶解后直接用火焰原子吸收法测定镍、钴的含量。这种方法具有较高的准确度和精密度，适用于大体积水样的富集测定
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| 关 键 词： | 饮用水 镍 钴 硫化物 沉淀 原子吸收分光光度法 |
DETERMINATION OF TRACE NICKEL AND COBALT IN POTABLE WATER BY FLAME ABSORPTION SPECTROMETRY-PRECONCENTRATION OF COPRECIPITATION |
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| Ju Meiting.DETERMINATION OF TRACE NICKEL AND COBALT IN POTABLE WATER BY FLAME ABSORPTION SPECTROMETRY-PRECONCENTRATION OF COPRECIPITATION[J].Journal of China University of Petroleum,1999(2). |
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| Authors: | Ju Meiting |
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| Institution: | Dongying:257062 |
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| Abstract: | Ni 2 and Co 2 can be precipitated with Bi 3 in sulfide when Bi 3 and
sodium sulphide is added to water sample. The sediment of sulfide can be separated from the
solution by filtration and syphon. After the sediment is dissolved by diluted nitric acid, Ni 2
and Co 2 in solution can be determined by the flame atomic absorption spectrometry
method. The precision and accurary of this method is high. These can be shown by repeated
determination of the same water and recovery test. |
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| Keywords: | potable water nickel cobalt sulfide precipitation atomic adsorption spectrometry method |
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