Efficient enrichment and trace determination of hazardous compound of 2,4-dinitrophenol in environmental water samples using 2-aminothiophenol magnetic nanoadsorbent

Aromatic compounds, such as 2,4-dinitrophenol (2,4-DNP), are one of the significant sources of environmental pollutants that are toxic compounds and have noxious effects on the environment and human health. In this project, 2-aminothiophenol magnetic nanoadsorbent ( γ -Fe 2 O 3 @2-ATP) was synthesized and characterized. The prepared γ -Fe 2 O 3 @2-ATP was evaluated as a selective and efficient magnetic nanoadsorbent in the magnetic dispersive micro-solid phase extraction (MD–μ-SPE) method for the preconcentration and determination of trace amount of 2,4-DNP in the water samples spectrophotometrically. The significant variables, including the pH, amounts of sorbent, adsorption time, and desorption time, were optimized by experimental design method. Under optimized conditions, the linear range, limit of detection, and the relative standard deviation (%R.S.D) for the 2,4-DNP were 10–400, 2.73 ng mL −1 , and 2.44% ( n = 4), respectively. The method was successfully applied for the determination of 2,4-DNP in three different environmental water samples. It was validated via the analysis of the selected real samples by the high-performance liquid chromatography-ultraviolet detection method. Excellent recoveries for 2,4-DNP determination were obtained in spiked real samples.