Abstract

Abstract Two silica gel thin-layer chromatographic systems are described that are capable of distinguishing 18 common metallic cations by mobility and color development with one of three visualization reagents. Two groups of cations arise from this ion mobility: a “fast” group containing molybdenum, iron, antimony, tin, mercury, arsenic, cadmium, zinc, cobalt, copper, manganese, and bismuth, and a “slow” group containing chromium, aluminum, magnesium, nickel, calcium, and lead. The analytical method can be applied to comparing and identifying inorganic cations in small samples of evidential materials.

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