Document Detail

The 'vapour-phase' migration of styrene from general purpose polystyrene and high impact polystyrene into cooking oil.
MedLine Citation:
PMID:  8258408     Owner:  NLM     Status:  MEDLINE    
General purpose and high impact polystyrene (GPPS and HIPS, respectively) are used in many food packaging applications. In some packaging configurations, where there is no direct contact of a liquid surface with the polymer, 'vapour-phase' migration of styrene monomer from the polymer with subsequent absorption into food is thought to be a significant mode of transfer. Correlation of residual styrene concentrations in polystyrene with vapour-phase styrene migration is of interest in order to predict potential consumer exposure to styrene from food-packaging applications of this configuration. Studies of the migration of styrene from GPPS and HIPS into air with subsequent absorption of the monomer into cooking oil, 'vapour-phase' migration, was determined in a sealed system. The results showed that for both polymers the amount of styrene migrating from the polystyrene and being absorbed by the oil was proportional to the square root of the time of exposure. The diffusion coefficients calculated for the vapour-phase migration of styrene from both polymers were found to be in good agreement with the diffusion coefficients previously determined for the 'liquid-phase' migration of styrene from similar polymers where the polymers were completely submerged in the cooking oil. These results indicate that the styrene concentrations measured in both experiments were attributable to the intrinsic diffusion of styrene from polystyrene, and that contact with cooking oil did not accelerate migration in previous experiments.
K M Lehr; G C Welsh; C D Bell; T D Lickly
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association     Volume:  31     ISSN:  0278-6915     ISO Abbreviation:  Food Chem. Toxicol.     Publication Date:  1993 Nov 
Date Detail:
Created Date:  1994-01-19     Completed Date:  1994-01-19     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8207483     Medline TA:  Food Chem Toxicol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  793-8     Citation Subset:  IM    
Analytical Chemistry Laboratory, Dow Chemical Company, Midland, MI 48674.
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MeSH Terms
Food Contamination*
Food Handling
Food Preservation
Gas Chromatography-Mass Spectrometry
Hot Temperature
Plant Oils / metabolism*
Polystyrenes / metabolism*
Regression Analysis
Styrenes / metabolism*
Reg. No./Substance:
0/Plant Oils; 0/Polystyrenes; 0/Styrenes

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

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