Document Detail


Volatile and non-volatile radiolysis products in irradiated multilayer coextruded food-packaging films containing a buried layer of recycled low-density polyethylene.
MedLine Citation:
PMID:  16356891     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of gamma-irradiation (5-60 kGy) on radiolysis products and sensory changes of experimental five-layer food-packaging films were determined. Films contained a middle buried layer of recycled low-density polyethylene (LDPE) comprising 25-50% by weight (bw) of the multilayer structure. Respective films containing 100% virgin LDPE as the buried layer were used as controls. Under realistic polymer/food simulant contact conditions during irradiation, a large number of primary and secondary radiolysis products (hydrocarbons, aldehydes, ketones, alcohols, carboxylic acids) were produced. These compounds were detected in the food simulant after contact with all films tested, even at the lower absorbed doses of 5 and 10 kGy (approved doses for food preservation). The type and concentration of radiolysis products increased progressively with increasing dose. Generally, there were no significant differences in radiolysis products between samples containing a buried layer of recycled LDPE and those containing virgin LDPE (all absorbed doses), indicating the good barrier properties of external virgin polymer layers. Volatile and non-volatile compounds produced during irradiation affected the sensory properties of potable water after contact with packaging films. Taste transfer to water was observed mainly at higher doses and was more noticeable for multilayer structures containing recycled LDPE, even though differences were slight.
Authors:
S Chytiri; A E Goulas; A Badeka; K A Riganakos; M G Kontominas
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Food additives and contaminants     Volume:  22     ISSN:  0265-203X     ISO Abbreviation:  -     Publication Date:  2005 Dec 
Date Detail:
Created Date:  2005-12-16     Completed Date:  2006-04-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8500474     Medline TA:  Food Addit Contam     Country:  England    
Other Details:
Languages:  eng     Pagination:  1264-73     Citation Subset:  IM    
Affiliation:
Laboratory of Food Chemistry and Technology, Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece.
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MeSH Terms
Descriptor/Qualifier:
Color
Conservation of Natural Resources
Equipment Design
Food Contamination / prevention & control
Food Irradiation / methods
Food Packaging / methods*
Gamma Rays*
Gas Chromatography-Mass Spectrometry / methods
Isomerism
Polyethylene / chemistry*,  radiation effects
Radiation Dosage
Sensation*
Smell
Taste
Chemical
Reg. No./Substance:
9002-88-4/Polyethylene

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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