Miniaturized ternary deep eutectic solvent‐based matrix solid‐phase dispersion: A green sample preparation method for the determination of chlorophenols in river sediment

Abstract

New ternary deep eutectic solvents were prepared and applied as efficient green dispersing solvents in miniaturized matrix solid‐phase dispersion to extract chlorophenols from river sediments for the first time. High‐performance liquid chromatography coupled with a photodiode array detector was used to analyze the target analytes. The significant factors affecting the extraction were optimized as follows: dispersant (100 mg), sample (100 mg), ternary eutectic solvents (150 μl), grinding for 1 min, 450 μl of acetonitrile as the elution solvent, and vortex mixing for 20 s. Under the optimal conditions, the method exhibited excellent linearity (correlation coefficient > 0.9980), low limits of detection between 1.039–2.478 μg/g, and extraction recoveries between 93.9% and 99.2%. Furthermore, the method demonstrated excellent precision in the intra‐ and inter‐day analysis with a relative standard deviation below 6%. When compared to conventional extraction techniques, the miniaturized matrix solid‐phase dispersion considerably reduced samples and solvent usag, offering important environmental benefits. The green profile of the method was assessed using the complementary green analytical procedure index tool confirming its eco‐friendship. The technique was finally employed to evaluate sediment samples from three distinct locations along the Zuibaiji River, indicating its applicability for monitoring environmental samples.