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2-(2-喹啉偶氮)-4-甲基-1,3-二羟基苯固相萃取光度法测定水中铀(Ⅵ)
          
SOLID-PHASE EXTRACTION AND PHOTOMETRIC DETERMINATION OF URANIUM(Ⅵ) IN WATER WITH 2-(QUINOLINYLAZO)-4-METHYL-1,3-DIHYDROXYBENZENE (QAMDHB) AS COLOR REAGENT

摘    要
研究了2-(2-喹啉偶氮)-4-甲基-1,3-二羟基苯(QAMDHB)与铀的显色反应.在pH 7.8三乙醇胺-盐酸缓冲介质中,Triton X-100和氟离子存在下,QAMDHB与铀(Ⅵ)、氟离子反应生成1∶1∶1紫色三元稳定络合物,络合物的λmax=562 nm,ε=8.0×104L·mol-1·cm-1,铀含量在0~20 μg/10 mL内符合比耳定律.环境水样中的铀用TBP萃淋树脂固相萃取柱分离和富集后测定,方法的相对标准偏差在1.8%~2.4%之间,标准回收率在97%~104%.
标    签 光度法   2-(2-喹啉偶氮)-4-甲基-1,3-二羟基苯     固相萃取   Photometry   2-(Quinolinylazo)-4-methyl-1,3-dihydroxybenzene   Uranium(Ⅵ)   Solid-phase extraction  
 
Abstract
In a TEA-HCl buffer medium of pH 7.8,and in the presence of Triton X-100,a stable violet colored ternary complex was formed among U(Ⅵ),QAMDHB and F--ion in the mole ratio of 1∶1∶1.The absorption maxima of the complex was found at the wavelength of 562 nm,where the molar absorptivity of the color system was found to be 8.0×104L·mol-1·cm-1.Beer′s law was kept in the concentration range of 0-20 μg of U(Ⅵ) per 10 mL of solution.The method has been applied to the analysis of environmental water sample after an enrichment of the uranium by solid-phase extraction through a TBP elution resin solid-phase extraction column (7 mm×30 mm,30 μm).The acidity of the sample solution for solid-phase extraction was chosen as 5 mol·L-1 HNO3,water was used as eluant and the elution was carried out in the reverse direction.The RSD′s obtained were in the range from 1.8%-2.4%,and the recoveries were in the range of 97%-104%.

中图分类号 O657.31

 
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收稿日期 2005/5/12

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备注杨艳(1968-),女,云南玉溪人,讲师,主要从事无机及分析化学研究工作.

引用该论文: YANG Yan,LI De-liang,TAI Xi,HU Qiu-fen,YANG Guang-yu. SOLID-PHASE EXTRACTION AND PHOTOMETRIC DETERMINATION OF URANIUM(Ⅵ) IN WATER WITH 2-(QUINOLINYLAZO)-4-METHYL-1,3-DIHYDROXYBENZENE (QAMDHB) AS COLOR REAGENT[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2006, 42(9): 743~745
杨艳,李德良,台希,胡秋芬,杨光宇. 2-(2-喹啉偶氮)-4-甲基-1,3-二羟基苯固相萃取光度法测定水中铀(Ⅵ)[J]. 理化检验-化学分册, 2006, 42(9): 743~745


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参考文献
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【4】张晓敏,应敏.试剂4-(2-苯并咪唑偶氮)-间苯二酚与铀(Ⅵ)显色反应的研究与应用[J].分析测试学报,1997,16(2):69-72.
 
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【6】YANG Guang-yu,HUANG Zhang-jie,HU Qiu-fen,et al.Study on the solid phase extraction of Co(Ⅱ)-QADEAB chelate with C18 disk and its application to the determination of trace cobalt[J].Talanta,2002,58(3):511-515.
 
【7】HU Qiu-fen,YANG Guang-yu,YANG Ji-hong,et al.Spectrophotometric determination of silver with 2-(2-quinolylazo)-5-diethylaminophenol as chromogenic reagent[J].Analytical and Bioanalytical Chemistry,2002,374(7/8):1325-1329.
 
【8】HU Qiu-fen,YANG Guang-yu,YANG Ji-hong,et al.Study on determination of iron,cobalt,nickel,copper,zinc and manganese in drinking water by solid-phase extraction and RP-HPLC with 2-(2-quinolinylazo)-5-diethylaminophenol as precolumn derivatizing reagent[J].Journal of Environment Monitoring,2002,4(6):956-959.
 
【9】高小菌,白红梅,胡秋芬,等.2-(2-喹啉偶氮)-4-甲基-1,5-苯二酚光度法测定铜的研究[J].光谱实验室,2002,19(2):143-145.
 
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