2008•Journal of Liaoning UniversityRequires access

Study on Colour Reaction Between Gallium and p-acetylcarboxylazo-m and Its Application

Deng Gui-chun

Abstract

The colour reaction between gallium and p-acetylcarboxylazo-m is studied in this paper.In the acid medium of pH 2.0,p-acetylcarboxylazo-m and gallium form a coloured complex with mole ratio of 1:2.The maximum absorption wavelength is at 681 nm with an apparent molar absorptivity of 1.14×105 L·mol-1·cm-1. The detection limit is 0.73 μg/L and the linear range is 1.0～11.0 μg/25 mL of gallium.The method has been applied to the determination of microamount of gallium in coal and shale with satisfactory results.

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Key concepts: Gallium, Molar absorptivity, Absorption (acoustics), Analytical Chemistry (journal), Chemistry, Molar ratio, Wavelength, Nuclear chemistry