Fabrication of method with nano-plates by dispersive solid-phase extraction of anionic dye from aqueous solution Eriochrome Black T (EBT)

A UV-Vis spectrophotometric method for the determination of eriochrome black T (EBT) after adsorption of synthesis 2-aminopyridine/graphene oxide nano-plates has been developed. The nanocomposite was used to remove eriochrome black T (EBT) from the aqueous solution. The effects of pH, adsorption time, initial concentration of EBT, dose, and temperatures were studied. Applying a facile and accessible sample preparation method is highly important before the experimental analysis process. In the current study, a technique was introduced for preconcentration and analysis of trace amounts of EBT in water samples. The important parameters in the analytical procedure of EBT were optimized such as the pH of extraction, amount and type of elution solvent, time of extraction, and the effect of another ion. Analytical parameters such as the concentration factor, the limit of detection (LOD) of the technique, and relative standard deviation (RSD %) were achieved as 25, 15.0 μg L-1, and 2.7%, respectively.