Copper selective self-sorting polymeric resin with mixed-mode functionality for column preconcentration and atomic absorption spectrometric determination

A new approach for the synthesis of a highly Cu(ii) selective mixed-mode solid phase extractant is proposed.

Glycidylmethacrylate based resin functionalized with graphene oxide for column preconcentration and trace determination of Cd(ii) and Ni(ii) in environmental and food samples

Graphene oxide decorated glycidylmethacrylate chelating resin was synthesized using a diethylenetriamine spacer arm and explored for the preconcentration/determination of Ni and Cd in environmental and food samples.

On-column preconcentration in sequential injection chromatography: application to determination of parabens

High enrichment factors were achieved by retaining the analytes at the head of the column in sequential injection chromatography, without hindering resolution or retention times.

Mercury(ii) and methylmercury determination in water by liquid chromatography hyphenated to cold vapour atomic fluorescence spectrometry after online short-column preconcentration

A method developed for the online preconcentration and speciation of mercury in water involves low sample volume and simple sample pre-treatment for obtaining good recoveries regardless of the water matrix composition.

Column Preconcentration and FAAS Determination of Heavy Metal Ions using Artemisia Siberi as an Adsorbent

A new column procedure for the determination of trace amounts of cadmium (II), lead (II), nickel (II), zinc (II), and copper (II), which combines flame atomic absorption spectrometry is described. These metals were sorbed on Artemisia siberi herb as an adsorbent at pH 4.0 and eluted with 3 mL of 1.5 M HNO3. The influences of analytical parameters including pH, flow rate, sample volume, type of eluent, and effect of diverse salts and cations on the recoveries of analyte ions were studied. The developed procedure provides preconcentration factors of about 117. LODs were 0.2 (Cd), 0.4 (Cu), 0.2 (Ni), 0.6 (Zn), and 1.4 (Pb) μg/L. The present method was successfully applied to the determination of the above-mentioned ions in water samples from Semnan, Iran. Recoveries greater than 95% and RSDs below 10% were obtained.