Document Type : Full research article
Authors
1 Department of Chemistry, Payame Noor University, Tehran, Iran
2 Department of Chemical Engineering, University of Science and Technology of Mazandaran, Behshahr, Iran
Abstract
A novel and highly efficient solvent bar microextraction (SBME) method was developed for the preconcentration and determination of trace nickel in water samples. The technique integrates a melt-blown facemask layer (MLF) as the extraction support, a hydrophobic deep eutectic solvent (DES), and dimethylglyoxime (DMG) as the chelating agent. Experimental conditions were optimized for maximum extraction efficiency, including an extraction time of 5 min, stirring rate: 300 rpm, pH: 10, sample volume: 200 mL, and MLF area: 14 cm². Elution was performed using 5 mL of ethanol, followed by quantification via flame atomic absorption spectrophotometry (FAAS). The method exhibited a linear range of 3–130 μg L-¹, a detection limit of 1 μg L-¹, a preconcentration factor of 40, and a relative standard deviation of 3.2% (n=10). The approach is rapid, cost-effective, environmentally friendly, and capable of providing precise trace nickel analysis in water samples with minimal solvent usage.
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