• 作者： K. C. Srivastava; (Miss) Usho Mehndiratta
• 作者服務機構： Department of Chemistry, Birla Institute of Technology and Science, Pilani, Rajasthan, India
• 中文摘要： 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 pH 4.0 and 5.5. The complex has a composition 1:2 and a formation constant of 6.4×10.. under the conditions studied. Beer’s law is obeyed upto 126μg 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.
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