Molecular characterisation of a bio-based active packaging containing Origanum vulgare L. essential oil using pyrolysis gas chromatography-mass spectrometry

BACKGROUND Environmental, economic and safety challenges motivate shift towards safer materials for food packaging. New bioactive packaging techniques, i.e. addition of essential plant oils (EOs), are gaining attention by creating barriers to protect products from spoilage. Analytical pyrolysis gas...

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Bibliographic Details
Published in:Journal of the science of food and agriculture 2016-07, Vol.96 (9), p.3207-3212
Main Authors: Llana-Ruíz-Cabello, María, Pichardo, Silvia, Jiménez-Morillo, Nicasio T, Bermúdez, José M, Aucejo, Susana, González-Vila, Francisco J, Cameán, Ana M, González-Pérez, José A
Format: Article
Language:English
Subjects:
active packaging
Biocompatibility
Butylene Glycols - chemistry
Chromatography
Diagnostic software
Food Packaging
Food safety
Gas Chromatography-Mass Spectrometry - methods
Mass spectrometry
Mathematical analysis
Monoterpenes - chemistry
Oils, Volatile - chemistry
Oregano
oregano essential oil
Origanum - chemistry
Origanum vulgare
Packaging
Plant Extracts - chemistry
polybutylene succinate
Polyesters - chemistry
polylactic acid
Polymers
Polymers - chemistry
Pyrolysis
pyrolysis gas chromatography-mass spectrometry
Succinic Acid - chemistry
Thymol - chemistry
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Summary:BACKGROUND Environmental, economic and safety challenges motivate shift towards safer materials for food packaging. New bioactive packaging techniques, i.e. addition of essential plant oils (EOs), are gaining attention by creating barriers to protect products from spoilage. Analytical pyrolysis gas chromatography–mass spectrometry (Py‐GC‐MS) was used to fingerprint a bioactive polylactic acid (PLA) with polybutylene succinate (PBS) (950 g kg−1:50 g kg−1) film extruded with variable quantities (0, 20, 50 and 100 g kg−1) of Origanum vulgare EO. RESULTS Main PLA:PBS pyrolysis products were lactide enantiomers and monomer units from the major PLA fraction and succinic acid anhydride from the PBS fraction. Oregano EO pyrolysis released cymene, terpinene and thymol/carvacrol peaks as diagnostic peaks for EO. In fact, linear correlation coefficients better than 0.950R2 value (P < 0.001) were found between the chromatographic area of the diagnostic peaks and the amount of oregano EO in the bioplastic. CONCLUSION The pyrolytic behaviour of a bio‐based active package polymer including EO is studied in detail. Identified diagnostic compounds provide a tool to monitor the quantity of EO incorporated into the PLA:PBS polymeric matrix. Analytical pyrolysis is proposed as a rapid technique for the identification and quantification of additives within bio‐based plastic matrices. © 2015 Society of Chemical Industry
ISSN:0022-5142
1097-0010
DOI:10.1002/jsfa.7502