引用本文:
吴宏伟, 李全民, 刘国光. 微晶酚酞-乙基紫分离富集镉(Ⅱ)[J]. 应用化学,
2006, 23(6): 607-611.
Citation: WU Hong-Wei, LI Quan-Min, LIU Guo-Guang. Concentration and Separation of Cadmium with Microcrystalline Phenolphthalein Modified by Ethyl Violet[J]. Chinese Journal of Applied Chemistry, 2006, 23(6): 607-611.
Citation: WU Hong-Wei, LI Quan-Min, LIU Guo-Guang. Concentration and Separation of Cadmium with Microcrystalline Phenolphthalein Modified by Ethyl Violet[J]. Chinese Journal of Applied Chemistry, 2006, 23(6): 607-611.
微晶酚酞-乙基紫分离富集镉(Ⅱ)
English
Concentration and Separation of Cadmium with Microcrystalline Phenolphthalein Modified by Ethyl Violet
Abstract:
With the presence of KI,Cd(Ⅱ) can react with I- to form metal complex anions CdI3- and CdI42- at pH 1.0~6.0,which can be well adsorbed on microcrystalline phenolphthalein modified by ethyl violet.Cd(Ⅱ) can be completely separated from Zn(Ⅱ),Fe(Ⅱ),Co(Ⅱ),Ni(Ⅱ),Mn(Ⅱ),Cr(Ⅲ) and Al(Ⅲ) under optimized conditions.This method was successfully applied to the concentration and determination of trace cadmium in environmental aqueous samples.The preconcentration factor can reach 100~200 times.Cadmium in natural water samples was concentrated prior to determination by FAAS.The recovery is above 96%.The detection limit is 0.018 μg/L.
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Key words:
- microcrystalline phenolphthalein
- / ethyl violet
- / separation and concentration
- / cadmium
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