ISSN:
0021-8383
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Spectrophotometric study of the colour reaction of sodium salt of 3 hydroxy-4-((-2-hydroxy-1-naphthyl)azo)-1-naphthalene sulfonic acid (SDB) with gallium and Indium is described for the determination of micromaounts of gallium and indium. The absorbance curves of the complexes at pH 3.0 show λ max of SDB alone at 550 mμ while for ga-chelate λ max is 580 mμ and for In-chelate it is 570 mμ. The study was made at 590 mμ where the reagent absorbs very little. The optimum conditions for the microdetermination of gallium and indium using this reagent have been described and include the effect of pH on colour intensity of chelate, effect of excess of reagent, range of adherence to BEER'S law, sensitivity, molar absorption coefficient, rate of colour formation and stability of colour at room temperature. The effects of various diverse ions have also been studied and it was found that many ions do not interfere in the spectrophotometric determination of Gallium and Indium using SDB.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19680380511
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