Synthesis of Salicylaldehyde-5-bromo-salicylo and Its Fluorescence Reaction with Scandium

Abstract

Abstract: Anew fluorescent reagent, salicylaldehyde-5-bromo-salicyloyhydrazone (SABSH ), was synthesized and its ionization constants were established spectropho-tometrically. The fluorescent reaction of this reagent with scandium was studied in detail.Based on this chelation reaction, a spectrofluorimetric method was developed for the determi-nation of scandium in a water-ethanol(1:1, V/V) medium at pH 4.8. Under these condi-tions, the Sc-SABSHcomplex has excitation and emission maxima at 392 and 466 nm, re-spectively. The linear range of the method is from 0.0 to 1.0μg/10 mL, the relative stan-dard deviation of the method is 0.95% and the detection limit is o. 15 ng/mLof scandium when a standard additions method is used in the assay. The molar ratlo of scandium to reagent is 1: 1. Interferences of forty other ions were studied. The method has been suc-cessfully applied to the determination of trace scandium in geologic samples-

Key words: Salicylaldehyde-5-bromo-salicylo, Scandium, Fluorimetry

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TANG Bo, ZHANG Sheng-Yi, JIANG Chong-Qiu, ZHANG Xiao-Gang, LI Yan. Synthesis of Salicylaldehyde-5-bromo-salicylo and Its Fluorescence Reaction with Scandium[J]. Chem. J. Chinese Universities, 1997, 18(6): 883.

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Synthesis of Salicylaldehyde-5-bromo-salicylo and Its Fluorescence Reaction with Scandium

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