Solid Phase Extraction Preconcentration of Platinum with Microspheres Containing Octyl Benzothiazolyl Sulfoxide

摘要

The extraction of platinum(TV) in hydrochloric acid medium was carried out using the microspheres containing octyl benzothiazolyl sulfoxide as the extractant. Adsorption capacities under optimum conditions were determined. According to the results, the optimum operating conditions for platinum extraction by the microspheres were octyl benzothiazolyl sulfoxide content = 35 % (w/w), hydrochloric acid concentration = 4.0 mol L~(-1) and contact time = 10 min. Under these optimum operating conditions, Pt(IV) ions adsorption capacities increased with increasing initial Pt(IV) ions concentration and it reached the maximum value at 39 mg g~(-1). Successful striping of Pt(IV) from the microspheres were achieved with 0.4 wt % sodium hydroxide solution. The microspheres can be reused at least in ten cycles of extraction-stripping process.