A novel-easy deep eutectic solvent-based microextraction procedure for the separation, preconcentration and spectrophotometric determination of chromotrope 2R in water, detergent and food samples

ABSTRACT

An efficient and simple deep eutectic solvent (DES)-based liquid phase microextraction method has been used for chromotrope 2R dyestuff at trace levels prior to its UV-Vis spectropthometric determination. In this aspect, DES was prepared by decanoic acid and tetra-n-butylammonium bromide component used as 1:3 molar ratios. The developed separation-preconcentration method was optimised various analytical parameters such as pH, sample volume, eluent sample volume, volume of DES, sample volume of tetrahydrofuran (THF) and matrix effect etc. on the recovery of chromotrope 2R dyestuff were investigated. Quantitative recovery data for chromotrope 2R were found at pH 3.0. The detection limits of the chromotrope 2R were found to be as 5.4 µg L⁻¹. The accuracy of the developed method was successfully applied by the determination of the addition-recovery studies in the water sample, detergent and food samples with satisfactory results. The proposed method was applied to natural water samples for the determination of chromotrope 2R with satisfactory results.

KEYWORDS:

• Chromotrope 2R
• separation
• microextraction
• deep eutectic solvent
• UV-visible spectrophotometry

Acknowledgements

Sayed Nasrullah Shah is very grateful to the Scientific and Technological Research Council of Turkey (TUBITAK) under “2221 (visiting researcher (Postdoctoral fellow)) Research Fellowship Programme for Foreign Citizens”. The authors are thankful of Erciyes University for providing good environment and facility of chemical laboratory.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the TUBITAK [2221].