微波消解-固相萃取光度法测定钴

冶金分析 , 2003, 23(6): 10-12. doi: 10.3969/j.issn.1000-7571.2003.06.004

微波消解-固相萃取光度法测定钴

台希 ^1, , 李海涛 ^2, , 李明 ^3, , 胡秋芬 ^4, , 杨光宇 ^5, , 尹家元 ^6,

1.玉溪师范学院化学系,云南玉溪,653100

2.玉溪师范学院化学系,云南玉溪,653100

3.玉溪师范学院化学系,云南玉溪,653100

4.玉溪师范学院化学系,云南玉溪,653100

5.云南大学化学系,云南昆明,650091

6.云南大学化学系,云南昆明,650091

关键词： 2-(2-喹啉偶氮)-5-二甲氨基酚 , 钴 , 固相萃取 , 光度法

Study on microwave digestion and solid phase extraction and spectrophotometric determination of cobalt

根据新试剂2-(2-喹啉偶氮)-5-二甲氨基酚(QADMAP)与钴的显色反应及C18固相萃取小柱对显色络合物的固相萃取,建立了一种测定食品和水样中痕量钴的新方法.在pH3.5的HAc-NaAc缓冲介质中,溴化十六烷基三甲基铵(CTMAB)存在下,QADMAP与钴反应生成2∶1稳定络合物,该络合物可用C18固相萃取小柱富集,小柱上富集的络合物用乙醇(内含体积分数2%乙酸)洗脱后用光度法测定.在测定液中,络合物最大吸收波长为610nm,摩尔吸光系数ε＝1.14×105,钴质量浓度在0～1.0μg/mL内符合比尔定律.方法用于食品和水样中钴的分析,结果令人满意.

参考文献

[1]	Min A S;Ahmed I S;Moustafa M E .[J].Analytical Letters,2001,34:749.
[2]	马文瑾;郭满栋 .[J].理化检验-化学分册,1999,35(06):284.
[3]	黄伟坤.食品分析与检验[M].北京:中国轻工业出版社,1989
[4]	GB/T8538.29-1987.GB/T8538.29-1987.饮用天然矿泉水中钴的测定方法[S].
[5]	Zhong Li;Guangyu Yang;Baoxing Wang et al.[J].Analytical and Bioanalytical Chemistry,2002,374:1318.
[6]	Guangyu Yang;Zhangjie Huang;Qiufen Hu;Jiayuan Yin .Study on the solid phase extraction of Co(II)-QADEAB chelate with C_(18) disk and its application to the determination of trace cobalt[J].Talanta: The International Journal of Pure and Applied Analytical Chemistry,2002(3):511-515.
[7]	张海霞,邓华,刘满仓,朱彭龄.用于固相萃取的聚乙二醇交联辛烷基、苯基、氨基和氰基固定相[J].分析化学,2001(09):1003-1007.
[8]	胡秋芬,杨光宇,汤丹俞,尹家元.2-（2-喹啉偶氮）-5-二乙氨基苯甲酸固相萃取光度法测定环境水样中的镍[J].分析化学,2002(06):699-701.
[9]	Qiufen Hu;Guangyu Yang;Jiayuan Yin;Yun Yao .Determination of trace lead, cadmium and mercury by on-line column enrichment followed by RP-HPLC as metal-tetra-(4-bromophenyl)-porphyrin chelates[J].Talanta: The International Journal of Pure and Applied Analytical Chemistry,2002(4):751-756.
[10]	Zhong Li;Guangyu Yang;Baoxing Wang;Jiayuan Yin .[J].Journal of Chromatography A,2002,971(1/2):243.
[11]	谷学新,邹洪,朱若华.分析化学中的分离技术[J].分析试验室,2001(03):96-108.
[12]	Qiufen Hu;Yang Guangyu;Zhangjie Huang;Jiayuan Yin .Spectrophotometric determination of silver with 2-(2-quinolylazo)-5-diethylaminoaniline[J].Talanta: The International Journal of Pure and Applied Analytical Chemistry,2002(3):467-473.
[13]	Guangyu Yang;Qiufen Hu;Jihong Yang;Jiayuan Yin .Solid phase extraction and spectrophotometric determination of silver with 2-(2-quinolylazo)-5-diethylaminophenol as chromogenic reagent[J].Analytical Sciences: The International Journal of The Japan Society for Analytical Chemistry,2003(2):299-302.

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微波消解-固相萃取光度法测定钴

Study on microwave digestion and solid phase extraction and spectrophotometric determination of cobalt

参考文献