Preconcentration of Metal Ions Using Silica Gel 60 F254

Abstract

This research described a column packed with unmodified activated silica gel as sorbent for preconcentration of Cd, Co, Cr, Cu, Fe, Mn, Ni and Pb prior to their analysis by flame atomic absorption spectrometry (FAAS). Recovery values ranged from 84.5% (Mn) to 105.2% (Fe) under optimized conditions (pH 9, flow rate 6 mL/min, preconcentration factor 10).