Supramolecular solvent microextraction of uranium at trace levels from water and soil samples

Abstract

Abstract:A supramolecular solvent microextraction procedure was established for the separation/preconcentration of uranium(VI) (U(VI)) prior to its determination by UV-Vis spectrophotometry. 1-(2-Pyridylazo)-2-naphthol (PAN) was used to form a red chelate (U-PAN) with U(VI) at pH 10. U-PAN was extracted by undecanol in tetrahydrofuran. All the parameters that affect extraction efficiency like solution pH, amount of ligand, type and volume of supramolecular solvent, sample volume, and diverse ion effect were optimized. The preconcentration factor was 17. The detection limit was 0.31 µ g L −1 . The method was validated using GBW07424 (GSS-10 certified reference material). Microextraction was also applied to water and soil samples.

Ultrasound assisted supramolecular liquid phase microextraction procedure for Sudan I at trace level in environmental samples

“…The pH of the medium is very important in terms of the transition of analytes to the extraction phase and thus extraction efficiency [33][34][35][36][37][38]. pH of the model solution formed for this purpose was adjusted using buffer solutions varying between 3.0 -10 and the remaining steps of the method were applied (Figure 2.).…”