Original

Thin.Layer Chromatography of Certain Metal Cations with Anionic Micellar Mobile Phase Systems: Simultaneous Separation of Co.existing Gold (III), Copper (II) and Silver (I) and Quantitative Spectrophotometric Measurement of Copper (II)

Ali Mohammad*, Yasir Hamid Sirwal and Sufia Hena

Analytical Research Laboratory, Department of Applied Chemistry, Faculty of Engineering & Technology, Aligarh Muslim University, Aligarh−202 002, INDIA

Abstract:

Silica gel in combination with surfactant−mediated eluents has been used for thin−layer chromatography of sixteen metal cations. Several combinations of mobile phase systems comprising of sodium dodecyl sulfate (SDS) plus organic non−electrolytes and inorganic electrolytes have been tested for rapid and reliable separation of metal cations. TLC system constituting silica gel as a stationary phase and 0.3% SDS (pH 2.3) plus 5% aqueous NaCl (9:1, v/v) as mobile phase was identified most favorable system for the separation and identification of co−existing gold, copper and silver in alloys. Semiquanititative determination of Cu2+, Co2+, Ni2+ and Cd2+ by spot−area measurement method has been attempted. TLC−spectrophotometry technique has been used for quantitative determination of Cu2+ in synthetically prepared ores and alloys with preliminary separation from Au3+ and Ag+.

Keywords: Micellar TLC, Separation, Metal cations, Gold, Copper, Silver, Spectrophotometry

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