A direct method, based on atomic absorption spectroscopy, is described for the microdetermination of zinc in pharmaceutical preparations. The samples were dissolved in a mixed solvent containing water, hydrochloric acid, ethanol and butane-2-one. The solution was then aspirated into an air- acetylene flame and absorbance of zinc was measured. Effects of organic solvents and hydrochloric acid on zinc absorption have been investigated. Metallic zinc was used as the standard. The method has been found simple, rapid and equally useful for organic and inorganic zinc in pharmaceutical preparations.
J ANWAR ,K HAIDER ,R MAHMOOD ,A BOKHARI ,
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