Development of a dispersive solid phase extraction procedure using a natural adsorbent as an efficient and costless sorbent followed by dispersive liquid–liquid microextraction

ABSTRACT

In this work a natural and costless adsorbent (Sesamum indicum seeds waste) was used for the accomplishment of a dispersive solid phase extraction procedure followed by dispersive liquid–liquid microextraction for the extraction and preconcentration of some phthalate esters and antioxidants in drinks and liquids prior to their determination by gas chromatography–flame ionisation detection. Under the optimum conditions, limits of detection and quantification were achieved in the ranges of 0.67–1.24 and 2.21–4.11 µg L^–1, respectively. The obtained relative standard deviations for the solutions with a concentration of 30 µg L^–1 with respect to each analyte were in the ranges of 3.8–5.7% for intra– (n = 6) and 4.7–8.1% for inter–day (n = 4) precisions. The enrichment factors for the analytes were computed to be in the range of 205–235. The efficiency of the method was evaluated by analysing different drinks and liquids as real samples.

KEYWORDS:

• Dispersive solid phase extraction
• dispersive liquid–liquid microextraction
• gas chromatography
• Sesamum indicum seeds waste
• antioxidant
• phthalate ester

Acknowledgments

The authors thank the Research Council of University of Tabriz for financial support.

Disclosure statement

No potential conflict of interest was reported by the authors.