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Abstract
An analytical method has been developed for the fluorimetric determination of microgram amounts of gallium in solution, based on the reaction of gallium with 1,5-bis(salicylmethyleneamino)guanidine at pH 3.4–3.7 in an aqueous ethanol medium. The influence of reaction variables has been investigated. The detection limit is 1 ng ml–1 and the range of application is 1–250 ng ml–1 of gallium. The error of the method is ±2.9%. The effect of interferences has been studied and the method applied to the determination of gallium in biological tissues after destruction of the organic matter with HNO3-H2O2.
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