Document Detail

Study of diffusion through LDPE film of Di-n-butyl phthalate.
MedLine Citation:
PMID:  10645349     Owner:  NLM     Status:  MEDLINE    
The apparent diffusion coefficients (D) across a PE-LD film of Di-n-butyl phthalate (DnBP) dissolved in isooctane and ethanol, were calculated in different ways and compared. DnBP, a common plasticizer of plastics and printing inks, may be a possible contaminant of flexible packaging and PE-LD is the most common food-contacting polymer. To perform diffusion measurements, small plastic sachets filled with solutions of the contaminant were used at three different temperatures. The D coefficients of the two solvents and dissolved DnBP were calculated using the lag time method, a formula taking into account the molar weight and absolute temperature, and an equation based on the initial concentration and the amounts migrated after subsequent times. The results demonstrated great solvent interference in the plasticizer diffusion across polyethylene; in particular as far as isooctane is concerned, a remarkable co-diffusion of both the plasticizer and the non-polar solvent must be assumed. Isooctane quickly penetrates PE-LD but ethanol also diffuses across PE-LD, although at a greatly reduced speed. These facts must be considered for realistic prediction of migration or effectiveness of the functional barrier.
L Piergiovanni; P Fava; A Schiraldi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Food additives and contaminants     Volume:  16     ISSN:  0265-203X     ISO Abbreviation:  Food Addit Contam     Publication Date:  1999 Aug 
Date Detail:
Created Date:  2000-02-08     Completed Date:  2000-02-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8500474     Medline TA:  Food Addit Contam     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  353-9     Citation Subset:  IM    
diSTAM, Department of Food Science and Microbiology, University of Milan, Italy.
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MeSH Terms
Dibutyl Phthalate / chemistry*
Food Packaging*
Models, Chemical
Plasticizers / chemistry*
Polyethylene / chemistry*
Reg. No./Substance:
0/Octanes; 0/Plasticizers; 0/Solvents; 64-17-5/Ethanol; 84-74-2/Dibutyl Phthalate; 9002-88-4/Polyethylene

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