engleski

Quantitative Determination of Mg in Al-Alloys by Ion-Exchange TLC

Analytical procedure for the quantitative determination of Mg in Al-alloys using ion-exchange thin layer chromatography is described. Chromatographic plates were coated with Amberlite IRP-69 (strong-acid cation exchanger in H+ form) mixed in different ratios with microcristalline cellulose. Solutions of HCl and HNO3 respectively, in the concentration range from 0.5-2.0 moldm-3 were used as developers. Chromatograms were visualized by spraying with ethanolic solution of 8-hydroxyquinoline and spots were scanned using Camag Turner Fluorometer 111. The optimal separation was obtained on TLC plates containing 23% of ion-exchanger (particle size < 60 micrometer) and by eluting with 1.25 M HCl. Rf(Al)=0.12, Rf(Mg)=0.41.

Al-alloys; Amberlite IRP-69; microcristalline celulose; thin-layer chromatography

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