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《Chinese Journal of Rare Metals》 2008-01
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Solid Phase Extraction-Spectrophotometry Determination of Trace Scandium with Pyrogallol Red

Li Huizhi,Xie Wenxiu,Wang Jianbin(School of Chemistry and Chemical Engineering,University of Jinan,Jinan 250022,China)  
The chromogenic reaction of pyrogallol red with scandium(Ⅲ) was studied.It was found that pyrogallol red with scandium(Ⅲ) could form a stable complex with the mole ratio 2∶1 in the presence of CTMAB and C6H12N4-HCl buffer solution(pH=6.2) medium and this complex could be enriched on 717# resin.The resulted resin could be used to determine scandium by spectrophotometry at maximum absorption 500 nm.Its apparent molar absorptivity ε was 1.38×105 L·mol-1·cm-1,at 500 nm.Beer′s law was obeyed in the range of 0.01~0.6 μg·ml-1 for Sc(Ⅲ) and r=0.9971.More than 30 categories co-existing ions could not interfere with the determination.This was a new method developed solid phase spectrophotometry.This method was applied to analysis of scandium in the samples of alloy,ore and coal gangue contained trace scandium and the obtained results were satisfactory.
【Fund】: 山东省自然科学基金资助项目(Y2000B09)
【CateGory Index】: O657.3
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