Solid Phase Extraction of Cu(II), Pb(II), Fe(III), Co(II), and Cr(III) on Chelex‐100 Column Prior to Their Flame Atomic Absorption Spectrometric Determinations

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.

Keywords:

• Chelex‐100
• Column
• Solid phase extraction
• Microwave digestion
• Wet digestion
• AAS

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.