APPLICATION OF MACROPOROUS POLY(VINYL AMIDINE THIOCYANATE THIOUREA) CHELATE RESIN FOR ADSORBING AND SEPARATING TRACE CR, V, TI, BE, Y, LA, AND CU - DETECTION BY INDUCTIVELY COUPLED PLASMA OPTICAL-EMISSION SPECTROSCOPY

An ICP-OES method has been developed for use with synthetic macroporous poly(vinyl amidine thiocyanate-thiourea) chelate resin adsorption and separation of trace Cr, V, Ti, Be, Y, La, and Cu ions in solution. The conditions for quantitative enrichment and desorption of the above ions are investigated. The experiments show that the preserved resin is stable for 3 years, may be reused more than 7 times, and can still quantitatively adsorb these ions at pH 4-6. With enrichment factors of 50 and ion concentrations of 0.20 ng/ml for Be(II), 20 ng/ml for Ti(IV) and Cu(II), and 40 ng/ml for Cr(III), V(V), Y(III), and La(III), the recoveries desorbed with 10 ml of 6 m HCl are between 97.5 and 105% and the RSDs are in the range of 4.2-5.9%. A hundred-fold excess of other ions causes little interference in the determination of the ions. The results with enriched wastewater from a smelter plant are 0.19 ng/ml for Be, 19 ng/ml for Ti, 22 ng/ml for Cu, 38 ng/ml for Cr and V, and 42 ng/ml for Y and La ions. Recoveries of added standard are in the range of 97.2-104%. The contents of Be, Ti, Cu, Cr, V, Y, and La in a certified sample determined by the method are in good agreement with the certified values of the sample. © 1991.