Determination of copper(II) by flame atomic absorption spectrometry after its perconcentration by a highly selective and environmentally friendly dispersive liquid–liquid microextraction technique

Abstract

A new, simple, rapid, selective, and environmentally friendly method is proposed for the determination of Cu(II) ions based on the formation of the complex between these ions and salophen as the ligand followed by the dispersive liquid-liquid microextraction of the neutral hydrophobic complex formed in the organic phase and flame atomic absorption spectrophotometric detection. Various factors including the pH of the sample solution, concentration of salophen as the complexing reagent, type and volume of the extraction and disperser solvents, and extraction time affecting the extraction efficiency of Cu(II) ions and its subsequent analytical signal were studied and optimized. Under the optimized experimental conditions, the detection limit (3σ) and the enrichment factor were obtained to be 0.60 μg L −1 and 49, respectively, for 10.0 mL of the sample solution. The consumptive index was 0.20 mL and the calibration graph was linear in the range of 3.0-120 μg L −1. The relative standard deviations for six replicate measurements of 5.0, 20.0, and 50.0 μg L −1 of Cu(II) ions were 4.1%, 1.5%, and 1.8%, respectively. The proposed method was also successfully applied for the extraction and determination of Cu(II) ions in different water and food samples with satisfactory results.

Magnetic nanoprobes for rapid detection of copper ion in aqueous environment by surface-enhanced Raman spectroscopy

“…Mass spectroscopy has a lower detection limit, approaching ppb level. [8][9][10] Researchers are currently investigating alternative detection platforms, including electrochemical, uorescence, and colorimetric methods. Although electrochemical 11,12 and uorescence methods 13 provide high sensitivity for Cu 2+ in water samples, these two approaches require a complex operation process and high-cost equipment.…”

Application of a synthetic ligand in rapidly synergistic cloud point method for separation and preconcentration trace amounts of copper of water samples

“…Several methods including atomic absorption spectrophotometry [4, 5], differential pulse anodic stripping voltammetry [6], luminescent [7], inductively coupled plasma [8] and Ultraviolet‐visible spectrophotometry have been applied for the determination of copper. Uv‐vis spectrophotometry can be used due to ease of operation, inexpensive materials, and easy access.…”

Highly Selective and Sensitive (PPB Level) Quinolin‐Based Colorimetric Chemosensor for Cu(II)

“…A wide range of methods including atomic absorption spectroscopy, ion‐selective electrodes, inductively coupled plasma mass spectroscopy, inductively coupled atomic emission spectroscopy, voltammetry and X‐ray fluorescence, have been used for the detection of copper . Even though these methods provide a good level of detection over a wide range of concentration range, most of them require expensive instruments, well‐trained personnel and thorough sample preparation.…”

“…Herein we have shown the use of quinoline based molecular system,4‐pyridin‐2‐ylmethyleneaminophenol(QMAP)for the sensing of Cu(II) based on the change of the absorption spectrum of the molecule. Quinoline derivatives have been used as well as chemosensors for the selective detection of metals including copper Some quinoline derivatives have also been used to detect alkali metals, alkaline earth metals, and transition metals .…”