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- Title
Reversed Phase Dispersive Liquid–Liquid Microextraction for Sensitive Ion Chromatographic Determination of Metal Cations in Sesame Oil.
- Authors
Jaberi, Mohsen; Hashemi, Payman; Rahimi, Akram
- Abstract
Reversed-phase dispersive liquid–liquid microextraction (RP-DLLME) was proposed in the present work to separate and preconcentrate metal cations in sesame oil before their detection through ion chromatography-conductivity detection (IC-CDD). This method facilitates the direct extraction of cations like Na+, Pb2+, K+, Mg2+, and Ca2+ from oil specimens into an aqueous micro-drop to inject into the chromatography column. Four parameters were included in the process as the pH of water, volume of water and THF, and centrifugation time through a response surface technique. Five replicated analyses were performed under optimized circumstances (1.5 mL THF as a disperser and 60 μL water at pH 9 as an extraction solvent). Thus, recoveries of 110%, 108%, 107.2%, 104.2%, and 106.8% were displayed with respective standard deviations of 10.3, 9.8, 7.3, 9.7, and 6.7 for K+, Na+, Mg2+, Pb2+, and Ca2+. The detection limits (3σ) for the method were 0.007 μg mL−1 for K+, 0.001 μg mL−1 for Na+, 0.011 μg mL−1 for Mg2+, 0.008 μg mL−1 for Pb2+, and 0.009 μg mL−1 for Ca2+. The method could successfully determine the existence of metal cations in four sesame oil specimens.
- Publication
Food Analytical Methods, 2023, Vol 16, Issue 11/12, p1646
- ISSN
1936-9751
- Publication type
Article
- DOI
10.1007/s12161-023-02531-3