title: Direct determination of carnosic acid in a new active packaging based on natural extract of rosemary.
abstract: A new antioxidant film is being developed that incorporates a natural extract of rosemary and is intended for contact with food. The rosemary extract has been screened and carnosic acid and carnosol have been determined as the major antioxidant components (6.96% and 0.88%, respectively) that are responsible for the antioxidant properties of the whole extract. Thus, a fast method for the direct determination of carnosic acid in the packaging material, in order to evaluate the antioxidant capacity of the new active plastic, has been developed and optimized. The method consists of extraction from the plastic with methanol, followed by anion exchange solid-phase extraction and final analysis by UPLC-MS. Using this process, the recovery of carnosic acid is about 99%. The complete analytical performance of the method developed here is also assessed. The analytical features of the method, such as the relative standard deviation, reproducibility, repeatability, linear range, and detection and quantification limits, are shown. This method can be subsequently modified to monitor other active components in different packages, and it constitutes a crucial step forward in research into new and improved commercial antioxidant packages.
authors.affiliation: Department of Analytical Chemistry, Aragón Institute of Engineering Research (I3A), CPS-University of Zaragoza, María de Luna st. 3, 50018 Zaragoza, Spain.
authors.forename: K
authors.initials: K
authors.lastname: Bentayeb
authors.forename: C
authors.initials: C
authors.lastname: Rubio
authors.forename: R
authors.initials: R
authors.lastname: Batlle
authors.forename: C
authors.initials: C
authors.lastname: Nerín
mesh_terms: D045784:Abietanes / Q000032:analysis*; D000975:Antioxidants / Q000032:analysis*; D002853:Chromatography, Liquid / Q000379:methods; D004349:Drug Packaging; D013058:Mass Spectrometry / Q000379:methods; D000432:Methanol / Q000737:chemistry; D010936:Plant Extracts / Q000032:analysis*; D015203:Reproducibility of Results; D052616:Solid Phase Extraction / Q000379:methods; D012997:Solvents / Q000737:chemistry
chemical_list: D045784:Abietanes; D000975:Antioxidants; D010936:Plant Extracts; D012997:Solvents; C018381:salvin; D000432:Methanol