| A simple, green, and effective vortex-assisted dispersive liquid–liquid microextraction method was developed for
separation, preconcentration and spectrophotometric determination of thiabendazole in fruit samples. This
method is based on zwitterionic deep eutectic solvent. Four different deep eutectic solvents were prepared by
mixing betaine with 2-furoic acid, phenylacetic acid, mandelic acid, and glycolic acid at different molar ratio.
Then these solvents were used for the extraction of thiabendazole. The interaction of acid-betaine complexes
with TBZ molecule have been supported by theoretical investigation. Various analytical parameters such as pH,
type and volume of deep eutectic solvent, dispersing solvent type, vortex time, and sample volume were studied
and optimized. Tolerance limits of foreign species were also measured. The presented method provided a good
linearity in the range of 0.4–150 µg L− 1
, low limit of detection (0.1 µg L− 1
), high preconcentration factor (150)
and low relative standard deviation (below 2.5%). Presented method was successfully applied for extraction and
determination of thiabendazole in fruit samples. The accuracy of method was confirmed by comparison with the
standard addition method applied to the same fruit samples. |