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Citation: Wang Naixing, Qi Ping. SPECTROPHOTOMETRIC DETERIMNATION OF YTTRIUM SUBGROUP QF RARE EARTHS[J]. Chinese Journal of Applied Chemistry, ;1990, 7(1): 49-52. shu

SPECTROPHOTOMETRIC DETERIMNATION OF YTTRIUM SUBGROUP QF RARE EARTHS

Wang Naixing ¹ ,
Qi Ping ²

1.
1. Department of Applied Chemistry, Shangdong University, Jinan 250100;
2.
2. Shangdong Provincial Experimantal Centre, Jinan

Received Date: 28 April 1989
Available Online: 7 July 1989

Heavy rare earths can form a stable ternary complex with cetyltrimethylammonium bro-mide (CTMAB) and Ferron (7-iodo-8-hydroxyquinoline-5-sulfonic acid) in molar ratio of Y: Ferron:CTMAB=1:6: 9 for yttrium. The maximum absorption wavelength of the Y ternary complex was at 385nm at pH 3.2-3.8 of acetic acid-sodium acetate buffer.The ap-parent molar absorption coefficient was 1.5×10⁴ L·mol.cm^-1. The absorbance was linear to the concentration of yttrium below 44μg/10mL. A method has been developed for the rapid and selective microdetermination of yttrium subgroup in mixed rare earths, using NaF as a masking agent.
- Yttrium subgroup rare earth,
- spectrophotometry,
- ferron
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