Abstract
A solid phase extraction procedure for flame atomic absorption spectrometric determination of Cu(II), Pb(II), Fe(III), Co(II), and Cr(III) is proposed on Chelex‐100 resin. The sample solutions at pH 6 were pumped through a micro‐column at the rate of 2.0 mL/min by using a peristaltic pump. The elution of the retained analytes on the column was performed with 5 mL of 1 M HNO3 at 2.0 mL/min flow rate. The recoveries of analyte ions were greater than 95%. The relative standard deviations at the 50 µg/L levels of analyte ions were generally lower than 3% (N = 10). Recoveries of spike addition to bottled mineral water and artificial seawater were quantitative (>95%). The proposed preconcentration/separation method has been applied to determinations of the analyte contents of microwave and wet digested black tea and natural water samples. The validation of the developed preconcentration/separation procedure was carried out by successfully analyzing standard stream sediment (GBW7310) reference material.
Acknowledgment
The author here expresses his deep thanks to supports of the Scientific and Technical Research Council of Turkey (TUBITAK) (Project No: TBAG‐2163 (102T049)). Also the author is thankful to Dr. I. Narin and Dr. M. Tuzen for their help in the experiments.