ON-LINE SOLID PHASE EXTRACTION SYSTEM FOR CHROMIUM DETERMINATION IN WATER SAMPLES BY FLOW INJECTION-FLAME ATOMIC ABSORPTION SPECTROMETRY

ABSTRACT

An on-line solid phase extraction system has been established for flow injection flame atomic absorption spectrometric determination of chromium on Chromotrope 2R coated Amberlite XAD-1180 (2R-1180) resin. Some parameters such as pH, flow rates of sample and elution solution, matrix effects on the quantitative recoveries of chromium from the resin were examined. The detection limit (3σ) was 2.59 µg/L for preconcentration at 6.5 mL/min. The method was applied for the determination of traces chromium in natural water samples with satisfactory results (relative standard deviations below 5%, recoveries >95%).

Keywords:

• Flow injection
• Solid phase extraction
• Preconcentration
• Separation
• Chromotrope 2R Coated Amberlite XAD-1180 resin

ACKNOWLEDGMENT

The authors are grateful for the financial support of Research Foundation of Erciyes University (Kayseri-Turkey). The authors also would like to thank the Scientific and Technical Research Council of Turkey (TUBITAK) for providing Perkin-Elmer 3110 atomic absorption spectrometer used in the present study.