Solid phase extraction of copper traces using poly(styrene-divinylbenzene) membrane disks modified with pyridoxal salicyloylhydrazone in water samples

Abstract

A simple technique for the isolation, concentration and matrix simplification of Cu(II) ion in natural waters is proposed. This method has been developed using poly(styrene-divinylbenzene) membrane disks modified with the synthesized ligand pyridoxal salicyloylhydrazone (PSH). The retained ions on the disks were eluted with 10 mL 1 mol L(-1) HNO(3) and measured by flame atomic absorption spectrometry at 324.8 nm. The influence of pH, amount of ligand, type and amount of eluent for the stripping of copper ion from the membrane over extraction efficiency were evaluated. Extraction efficiencies >99% were obtained by elution of the disks with minimal amount of solvent with a preconcentration factor up to 100. The precision of the method for 10 replicate measurements of aqueous solutions containing 40 μg L(-1) Cu(II) was 1.5% at significance level of 95%. The breakthrough volume for 5 μg of Cu(II) was found to be 1000 mL and the detection limit of the method was 4 ng L(-1) of metal ion. The present method was successfully applied to the extraction and determination of copper in lake and sea waters.

Solid-Phase Extraction Coupled to a Paper-Based Technique for Trace Copper Detection in Drinking Water

“…Solid-phase extraction of metal ions has been previously demonstrated as a sample preparation technique for flame atomic absorption spectrometry, − X-ray fluorescence, , diffuse reflectance spectroscopy, − and intensity-based μPADs . In this work, Empore chelation disks were used to extract the metal ions from the sample to reduce the potential for interferences from sample matrix effects and to preconcentrate Cu from tap water samples for subsequent quantification using a distance-based μPAD.…”

Flame atomic absorption determination of ultra-trace zinc in environmental samples after pre-concentration by solid phase extraction

“…Solid phase extraction (SPE) is an attractive technique that reduces consumption of and exposure to solvent, disposal costs and extraction time. Recently, SPE cartridges and disks were successfully utilized for the pre-concentration and separation of trace metal ions from different matrices [19][20][21].…”

Colorimetric Solid-Phase Extraction Method for Cu(II) Ion Determination Using 2-Hydroxybenzaldehyde Benzoylhydrazone as Sensing Reagent

“…Also, SDB disks have the important advantage of being stable in the whole range of pH, and the selectivity of the disks can be improved with the immobilization of suitable reagents onto the solid sorbent. 25 Hence, the goal of this work was the development of a novel, simple, highly selective, portable, and costeffective sensor disk for the detection of copper ions in the aqueous environment with the combination of a rapid preconcentration technique and colorimetric chemistry detection using diffuse reflectance measurements. The Cu(II) sensor based on C-SPE was developed with aroylhydrazone as the selective reagent immobilized onto styrenedivinylbenzene polymer disks and a fiber optic to guide the light to and from the sensing area.…”

“…Also, SDB disks have the important advantage of being stable in the whole range of pH, and the selectivity of the disks can be improved with the immobilization of suitable reagents onto the solid sorbent. 25…”