A GREEN VORTEX-ASSISTED IONIC LIQUID-BASED DISPERSIVE LIQUID–LIQUID MICROEXTRACTION METHOD FOR PRECONCENTRATION AND DETERMINATION OF TRACE CADMIUM IN FOOD SAMPLES

RAGAA EL SHEIKH; MOHAMMED ABDULLAH ATWA; AMIRA ATEF ABDULLAH; ANDAYMAN ABOU ELFETOUH GOUDA

doi:10.22159/ajpcr.2020.v13i2.36394

Authors

RAGAA EL SHEIKH Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt.
MOHAMMED ABDULLAH ATWA Department of Crops, Food Technology Research Institute, Giza, Egypt.
AMIRA ATEF ABDULLAH Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt.
ANDAYMAN ABOU ELFETOUH GOUDA Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt.

DOI:

https://doi.org/10.22159/ajpcr.2020.v13i2.36394

Keywords:

Cadmium, Vortex-assisted, Ionic liquid, Microextraction, Food samples, Flame atomic absorption spectrometry

Abstract

Objective: Green, easy, and sensitive vortex-assisted ionic liquid-based dispersive liquid–liquid microextraction technique (VA-IL-DLLME) was developed to preconcentrate and determine trace quantities of cadmium (Cd2+) ions from real food samples, before detection by flame atomic absorption spectrometry.

Methods: The proposed technique base on the utilization of IL (1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate) as an extraction solvent for Cd2+ ions after the complexation with 2-(2’-benzothiazolylazo) chromotropic acid at pH 8.0. The impact of different analytical parameters on microextraction efficiency was investigated. The validation of the proposed procedure was verified by the test of certified reference material (SRM spinach leaves 1570A) applying the standard addition method.

Results: In the range of 1.0–300 μg/L, the calibration graph was linear. Limit of detection, preconcentration factor and the relative standard deviation (RSD%, 25, 150, and 250 μg/L, n=5) were 0.2 μg/L, 100, and 2.0–3.2%, respectively.

Conclusion: Green, VA-IL-DLLME method was developed and applied to preconcentrate and determine of trace quantities of Cd2+ in real food samples with satisfactory results. The obtained recovery values showed good agreement with the certified values.

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Author Biography

RAGAA EL SHEIKH, Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt.

Pharmaceutical Analysis

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