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2000
Volume 19, Issue 6
  • ISSN: 1573-4110
  • E-ISSN: 1875-6727

Abstract

Background: A new enrichment and sensitive determination method, which includes HPLCDAD analysis after Magnetic Solid Phase Extraction (MSPE), has been developed for trace analysis of Sibutramine molecules in herbal slimming products. Sibutramine is one of the most adulterated drug molecules in herbal products. Method: In the proposed method, Sibutramine molecules were pre-concentrated by using FeO@MPTMS-Dithizone magnetic sorbent synthesized in our laboratory. Desorption of Sibutramine molecules from the sorbent phase was carried out by using acetonitrile: methanol (1:1) solvent in the presence of pH 8.0 buffer before chromatographic determinations. Results: Analytical parameters of the method, such as linear range, enrichment factor, and determination limit, were determined after optimizing experimental variables such as interaction time, desorption solvent, pH, . The sibutramine molecule was analyzed by isocratic elution of acetonitrile and KHPO (pH 3.0, 0.05 M) (40:60) with a DAD detector at 223 nm wavelength. Limit of detection (LOD) value was calculated as 1.43 ng mL-1. Conclusion: Relative standard deviations (RSD) were below 3.20% for determinations of model solutions, including 100 ng mL-1 of Sibutramine. Finally, the developed method has been applied to herbal slimming tea samples with quantitative recovery experiments.

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/content/journals/cac/10.2174/1573411019666230703141135
2023-07-01
2025-07-13
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