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Preliminary quantification of the permeability, solubility and diffusion coefficients of major aroma compounds present in herbs through various plastic packaging materials
Author(s) -
Leelaphiwat Pattarin,
Auras Rafael A,
Burgess Gary J,
Harte Janice B,
Chonhenchob Vanee
Publication year - 2017
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.8626
Subject(s) - low density polyethylene , estragole , aroma , citral , solubility , polyethylene , eucalyptol , food packaging , polyethylene terephthalate , linalool , materials science , chemistry , food science , organic chemistry , composite material , essential oil
BACKGROUND Aroma permeation through packaging material is an important factor when designing a package for food products. The masses of aroma compounds permeating through films over time were measured at 25 °C using a quasi‐isostatic system. A model was proposed for estimating the permeability coefficients ( P ) of key aroma compounds present in fresh herbs (i.e. eucalyptol, estragole, linalool and citral) through major plastic films used by the food industry [i.e. low‐density polyethylene (LDPE), polypropylene (PP), nylon (Nylon), polyethylene terephthalate (PET), metalised‐polyethylene terephthalate (MPET) and poly(lactic acid) (PLA)]. Solubility coefficients ( S ) were estimated from the amount of aroma compound sorbed in the films. Diffusion coefficients ( D ) were estimated following from the relation P = D*S . RESULTS P and D for all four aroma compounds were highest in LDPE, except for eucalyptol, which P was slightly higher in PLA. The solubility coefficients and contact angles were highest in PLA suggesting the highest affinity of PLA to these aroma compounds. The theoretical solubility parameters were correlated with the solubility coefficients for estragole and citral, but not for eucalyptol and linalool. CONCLUSION The preliminary P , D and S of eucalyptol, estragole, linalool and citral through LDPE, PP, Nylon, PET, MPET and PLA can be useful in selecting the proper packaging material for preserving these specific aroma compounds in food products and can potentially be used for estimating the shelf life of food products based on aroma loss. © 2017 Society of Chemical Industry