Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1635354 | Rare Metals | 2006 | 6 Pages |
Abstract
A new catalytic spectrophotometric method was developed for the determination of trace amount of Se(IV) in microemulsion medium. The method is based on the catalytic effect of traces of Se(IV) on the oxidation of 2â²,4â²-dichlorophenylfluorone (p-CPF) by potassium bromate with HNO3 as an activator in the presence of nonionic microemulsion medium. Under optimum conditions, the calibration graph is linear in the range of 0.4-15 μg·Lâ1 of Se(IV) at 480 nm. The detection limit achieved is 9.86 à 10â10 μg·Lâ1. Samples were dissolved and the obtained trace Se(IV) was separated and enriched by sulphydryl dextrane gel (SDG). The method has been applied for determination of trace selenium with satisfactory results.
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Physical Sciences and Engineering
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Metals and Alloys
Authors
LI Huizhi, ZHAI Diantang, FAN Yingju,