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《JOURNAL OF ANALYTICAL SCIENCE》 1998-01
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Study on the Color Reaction of the Ion Association Complex of Yttrium Molybdate Butylrhodamine B System

Cheng Guangxiang, Li Zubi, Wang Jialin (Adult Education College, Yunnan University, Kunming, 650091) Xu Qiheng (Department of Chemistry, Yunnan University)  
Yttrium reacts with ammonium molydbate and butylrhodamine B(BRB) to form the color ion association complex in the presence of polyvinyl alcohol (PVA). Its apparent molar absorptivity is 4.74×10 5L·mol -1 ·cm -1 at 580nm. Beers law is obyed in the range of 0-3.0μg/25mL for yttrium. The ion association compex was stable at least for 72h. The molar ratio of yttrium(Ⅲ) to BRB in the ion association complex is 1∶2 by equilibrium movement method. Over 40 foreign ions were tested. Most common ions do not interfere. The method has been used for determination of yttrium in some ore samples with satisfactory results.
【CateGory Index】: O614.322
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