Direct determination of trace metal elements in sulfur by graphite furnace AAS

Abstract

A simple method without matrix interference for the direct determination of Al, Fe, Ni, Cr, In and Cu in sulfur by graphite furnace AAS has been developed. Effect of sulfur matrix could be removed easily by preheating furnace at 120∼500°C, and integrated absorbance-time profile with small background absorption was obtained. Furthermore, metal standard solutions could be used as calibration standards by using pyro-coated L'vov platform graphite tube. This proposed method was applied to the rapid determination of the trace metal elements in sulfur samples, using 1∼5 mg sample weight. The relative standard deviations of analytical values were within 10%. Accuracy of this method was checked by the HNO3-Br2 decomposition/ICP-AES method. © 1991, The Japan Society for Analytical Chemistry. All rights reserved.