Solid‐Phase Extraction and Preconcentration of Copper in Mineral Waters with 4‐(2‐Pyridyl‐Azo) Resorcinol‐Loaded Amberlite XAD‐7 and Flame Atomic Absorption Spectrometry

Abstract

A simple, sensitive, accurate, and selective method for determination of ultratrace levels of copper is modified. The method is based on preconcentration of copper on the 4-(2-pyridyl-azo) resorcinol-loaded amberlite XAD-7 (non-ionic copoly[styrene-acrylic compound]) at pH 5.0 to 6.5 for contact time as low as 45 minutes. The adsorbed copper was eluted with concentrated nitric acid and measured by flame atomic absorption spectrometry. Recoveries of up to 90% were achieved. The optimized preconcentration method was applied to copper determination in various water samples. The detection limit was found to be 0.09 ng mL 21 . The relative standard deviation was found to be 9% using 300 mL of 5.0 ng mL 21 for 10 replicate preconcentration procedures. Copper concentrations in the studied water samples were found to be in the ranges of 0.4 to 18.0 ng mL 21 . Water Environ. Res., 80, 2104Res., 80, (2008.

Cloud point extraction and flame atomic absorption spectrometric determination of cadmium(II), lead(II), palladium(II) and silver(I) in environmental samples

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Flame atomic absorption spectrometric determination of zinc, nickel, iron and lead in different matrixes after solid phase extraction on sodium dodecyl sulfate (SDS)-coated alumina as their bis (2-hydroxyacetophenone)-1, 3-propanediimine chelates

“…The performance characteristics of the proposed method and other selected SPE/FAAS systems for comparative purposes in the literature are given in Table 5. The proposed procedure shows good detection limits and precision with reasonable eluent volume, flow rate and preconcentration factor over other SPE off-line preconcentration methods [39][40][41][42][43][44][45][46]. The method is simple, accurate can be applied for the determination of analytes in environmental samples [39][40][41][42][43][44][45][46][47].…”

Selective separation and preconcentration of copper (II) in environmental samples by the solid phase extraction on multi-walled carbon nanotubes

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