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Deep eutectic solvent-based continuous sample drop flow microextraction combined with electrothermal atomic absorption spectrometry for speciation and determination of chromium ions in aqueous samples

Somayeh Fouladlou,Hakim Faraji,H. Shahbaazi,A. Moghimi,F. Azizinezhad

Published 2020 in Microchemical Journal

ABSTRACT

Abstract Deep eutectic solvent-based continuous sample drop flow-microextraction technique along with electrothermal atomic absorption spectroscopy has been developed as a green procedure to extract and measure chromium (Cr) speciation in aqueous samples. The efficacy of the independent variables was evaluated on the extraction efficiency through chemometric methods in three steps. The methods indicated good linearity for the analyte (R2=0.9989). The analytical signal, under optimal conditions, was linear in the range of 0.1-20 μg L-1. The limit of detection and quantification was estimated at the concentration of 0.096 and 0.162 μg L-1, respectively. The precision like repeatability and reproducibility was assessed by calculating relative standard deviation (RSD %), and these values were lower than 4.1% and 12.6%, respectively. Consequently, the proposed procedure was used to extract and analyze Cr ion in real samples, indicating satisfactory recoveries (95.6–106.2%).

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