微晶百里酚酞体系分离富集钴(Ⅱ)
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摘要
本文建立了一种微晶百里酚酞体系分离富集钴(Ⅱ)的新方法。探讨了Co~(2+)的分离富集机理。结果表明,在最佳条件下,控制pH=9.0,Co~(2+)与二乙基二硫代氨基甲酸钠(DDTC)形成的螯合物沉淀[Co(DDTC)_2]可被微晶百里酚酞定量吸附,实现了Co~(2+)与Cd~(2+)、Fe~(2+)、Cu~(2+)、Zn~(2+)、Mn~(2+)、Al~(3+)等定量分离。方法用于合成水样中微量Co~(2+)的定量分离,富集率为96.1%～102.0%。
A novel method for the separation enrichment of cobalt(Ⅱ) using microcrystalline thymolphthalein system was establised. The possible enrichment mechanism of Co~(2+) was discussed. The results showed that under the optimum conditions, chelate settlement of [Co(DDTC)_2] which formed by Co~(2+) and DDTC was quantitatively adsorbed on the surface of microcrystalline thymolphthalein by controlling pH 9.0. The quantitatively separation of Co~(2+) from Cd~(2+)、Fe~(2+)、Cu~(2+)、Zn~(2+) 、Mn~(2+)、Al~(3+) was achieved. The proposed method has been successfully applied to the separation of trace Co~(2+) in the samles of synthetic water, and the enrichment yield was 96.1 %～102.0 %.
A novel method for the separation enrichment of cobalt(Ⅱ) using microcrystalline thymolphthalein system was establised. The possible enrichment mechanism of Co~(2+) was discussed. The results showed that under the optimum conditions, chelate settlement of [Co(DDTC)_2] which formed by Co~(2+) and DDTC was quantitatively adsorbed on the surface of microcrystalline thymolphthalein by controlling pH 9.0. The quantitatively separation of Co~(2+) from Cd~(2+)、Fe~(2+)、Cu~(2+)、Zn~(2+) 、Mn~(2+)、Al~(3+) was achieved. The proposed method has been successfully applied to the separation of trace Co~(2+) in the samles of synthetic water, and the enrichment yield was 96.1 %～102.0 %.
引文
[1]王旭,郑立庆,李全民.微晶蒽分离富集测定痕量铜(Ⅱ)[J].应用化学,2011,28(10):1208-1212.
[2]何海诚,巨振海.利用吸附有双硫腙的微晶萘萃取色层富集-火焰原子吸收光谱法测定天然水中痕量铜[J].光谱学与光谱分析,1998,18(6):724-726.
[3]衷明华,温红丽,吕虎,等.微晶蜡相反射散射光度法测定镍的研究[J].冶金分析,2003,23(1):17-19.
[4]Li Q M,Zhao X H,Guan X,et al.A novel method of the separation/preconcentration and determination of trace molybdenum(VI)in water samples using microcrystalline triphenylmethane loaded with salicyl fluorone[J].Anal Chim Acta,2006,562:44-50.
[5]李全民,吴宏伟,刘国光.负载乙基紫的微晶酚酞吸附富集-分光光度法测定水中痕量钒[J].应用化学,2007,24(9):1036-1040.
[6]李全民,赵小红,蒋凯,等.固相萃取剂-微晶酚酞分离富集后光度法测定痕量铜[J].科学通报,2006,51(20):2365-2368.
[7]常文保,李克安.简明分析化学手册[M].北京:北京大学出版社,1981:240,262
[8]潘教麦,陈亚森,严恒太.显色剂及其在冶金分析中的应用[M].上海:上海科学技术出版社,1981:116.
[2]何海诚,巨振海.利用吸附有双硫腙的微晶萘萃取色层富集-火焰原子吸收光谱法测定天然水中痕量铜[J].光谱学与光谱分析,1998,18(6):724-726.
[3]衷明华,温红丽,吕虎,等.微晶蜡相反射散射光度法测定镍的研究[J].冶金分析,2003,23(1):17-19.
[4]Li Q M,Zhao X H,Guan X,et al.A novel method of the separation/preconcentration and determination of trace molybdenum(VI)in water samples using microcrystalline triphenylmethane loaded with salicyl fluorone[J].Anal Chim Acta,2006,562:44-50.
[5]李全民,吴宏伟,刘国光.负载乙基紫的微晶酚酞吸附富集-分光光度法测定水中痕量钒[J].应用化学,2007,24(9):1036-1040.
[6]李全民,赵小红,蒋凯,等.固相萃取剂-微晶酚酞分离富集后光度法测定痕量铜[J].科学通报,2006,51(20):2365-2368.
[7]常文保,李克安.简明分析化学手册[M].北京:北京大学出版社,1981:240,262
[8]潘教麦,陈亚森,严恒太.显色剂及其在冶金分析中的应用[M].上海:上海科学技术出版社,1981:116.