Turkowicz M, Jastrzebska I, Hryniewicka M, Kotowska U, Gudalewska D, Karpińska J. Investigation of lipoic acid - 4-methoxybenzyl alcohol reaction and evaluation of its analytical usefulness.
Food Chem 2019;
309:125750. [PMID:
31704079 DOI:
10.1016/j.foodchem.2019.125750]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 09/10/2019] [Accepted: 10/19/2019] [Indexed: 12/23/2022]
Abstract
The presented work is aimed to synthesize a new UV active derivative of α-lipoic acid (ALA) by its esterification with 4-methoxybenzyl alcohol (4-MBA, anise alcohol). The formation of ester was confirmed by 1HNMR, FTIR and UV spectroscopy. The analytical usefulness of the obtained compound for quantification of ALA in food items was examined using HPLC-UV and GC-MS systems. It was found that it is possible to assay ALA in the ester form in the concentration ranges: 5·10-6-1·10-4 mol L-1 by HPLC-UV and 1∙10-7-5∙10-5 mol L-1 by GC-MS techniques. The GC-MS procedure was applied for the determination of ALA in the food samples.
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