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The Spectrophotometric Determination of Gallium (III) with Glycine Thymol Blue
Author(s) -
Srivastava K. C.,
Mehndiratta Miss Usha
Publication year - 1974
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.197400009
Subject(s) - chemistry , gallium , molar absorptivity , reagent , thymol , glycine , tartrate , nuclear chemistry , inorganic chemistry , absorption (acoustics) , chromatography , amino acid , organic chemistry , biochemistry , essential oil , physics , acoustics , optics
The reaction between gallium (III) and glycine thymol blue has been studied spectrophoptometrically in order to establish the optimum conditions for determining traces of gallium. The gallium (III) glycine thymol blue complex has an absorption maximum at 560 nm against a reagent blank and is stable between p H 4.0 and 5.5. The complex has a composition 1 : 2 and a formation constant of 6.4×10 7 under the conditions studied. Beer's law is obeyed upto 126 μg of gallium. The net molar absorptivity has been found to be 11,000. The present method is very sensitive and rapid. Anions such as citrate and tartrate inhibit the colour development of the complex.