Journal Article

simple and fast method based on mixed hemimicelles coated magnetite nanoparticles for simultaneous extraction of acidic and basic pollutants

Asgharinezhad, Ali Akbar, Ebrahimzadeh, Homeira

2016

Overview

One of the considerable and disputable areas in analytical chemistry is a single-step simultaneous extraction of acidic and basic pollutants. In this research, a simple and fast coextraction of acidic and basic pollutants (with different polarities) with the aid of magnetic dispersive micro-solid phase extraction based on mixed hemimicelles assembly was introduced for the first time. Cetyltrimethylammonium bromide (CTAB)-coated Fe₃O₄ nanoparticles as an efficient sorbent was successfully applied to adsorb 4-nitrophenol and 4-chlorophenol as two acidic and chlorinated aromatic amines as basic model compounds. Using a central composite design methodology combined with desirability function approach, the optimal experimental conditions were evaluated. The opted conditions were pH = 10; concentration of CTAB = 0.86 mmol L⁻¹; sorbent amount = 55.5 mg; sorption time = 11.0 min; no salt addition to the sample, type, and volume of the eluent = 120 μL methanol containing 5 % acetic acid and 0.01 mol L⁻¹ HCl; and elution time = 1.0 min. Under the optimum conditions, detection limits and linear dynamic ranges were achieved in the range of 0.05–0.1 and 0.25–500 μg L⁻¹, respectively. The percent of extraction recoveries and relative standard deviations (n = 5) were in the range of 71.4–98.0 and 4.5–6.5, respectively. The performance of the optimized method was certified by coextraction of other acidic and basic compounds. Ultimately, the applicability of the method was successfully confirmed by the extraction and determination of the target analytes in various water samples, and satisfactory results were obtained.

• Publisher: Springer Berlin Heidelberg,Springer,Springer Nature B.V
• Subject: Acetic acid / Amines / Analysis / Analytical Chemistry / aromatic amines / Biochemistry / Carcinogens / cetyltrimethylammonium bromide / Characterization and Evaluation of Materials / Chemical properties / Chemistry / Chemistry and Materials Science / Chlorophenol / detection limit / Detection limits / Environmental protection / Extraction / Food Science / Herbicides / hydrochloric acid / Laboratory Medicine / Magnetite / Mass spectrometry / methanol / Methods / Methyl alcohol / Monitoring/Environmental Analysis / Nanomaterials / Nanoparticles / Optimization / p-nitrophenol / Pesticides / Phenols / Pollutants / Research Paper / Scientific imaging / Sorbents / sorption / Toxicity / Water analysis / Water sampling / Wood preservatives