| 共沉淀—流动注射富集——火焰原子吸收光度法测定烧碱中铜镍 |
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| 引用本文： | 张衍林.共沉淀—流动注射富集——火焰原子吸收光度法测定烧碱中铜镍[J].理化检验(化学分册),1996,32(1):16-18. |
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| 作者姓名： | 张衍林 |
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| 作者单位： | 齐鲁石化公司研究院 淄博 |
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| 摘 要： | 用Ｆｅ（ＯＨ）３作捕集剂，Ｃｕ＾２＋，Ｎｉ＾２＋与其生成的共沉淀用流动注射法富集并与基体分离，酸洗脱后次焰原子吸收光度法测定，用于工业碱中铜，镍的测定，在３０ｈ＾－１和１２０ｈ＾－１的进样频率下，富集倍数分别为１４．８和４．７，检出限分别为５ｎｇ．ｍｌ＾－１和６０ｎｇ．ｍｌ＾－１能满足烧碱中铜，镍的分析要求。
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| 关 键 词： | 原子吸收光度法 铜 镍 烧碱 氢氧化钠 |
FAAS DETERMINATION OF COPPER AND NICKEL IN CAUSTIC SODA THROUGH A PRECONCENTRATION BY FIA-COPRECIPITATION |
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| Zhang Yanlin.FAAS DETERMINATION OF COPPER AND NICKEL IN CAUSTIC SODA THROUGH A PRECONCENTRATION BY FIA-COPRECIPITATION[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,1996,32(1):16-18. |
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| Authors: | Zhang Yanlin |
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| Institution: | Research Institute of Qilu Petrochemical Corp. Zibo 255400 |
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| Abstract: | A flow injection approach for the preconcentration of copper and nickel from caustic soda by coprecipitation with Fe(OH)3 is proposed. With sampling frequencies of 30h-1 and 60h-1 for copper and nickel respectively ,concentration factors of 14.8 and 4. 7 are achieved. The interferences caused by the foreign ions,mainly Mg2+, were examined and discussed. The determination is concluded by flame atomic absorption spectrometry,and when applied to the analysis of industrial caustic soda,the RSD obtained are 6. 2%(n = 6) and 3. 2% (n=5),the average recovery obtained are 98. 5% and 95. 3% ,and the detection limits (3o) are 5. 0ng ?ml-1 and 60ng ?ml-1,for copper and nickel respectively. |
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| Keywords: | Coprecipitation Flow injection preconcentratton Flame atomic absorption spectrometry Copper Nickel Caustic soda |
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