Document Detail

Identification of non-visible set-off in food contact materials by ambient ionization-accurate mass spectrometry (AMI-AMS).
MedLine Citation:
PMID:  22250944     Owner:  NLM     Status:  Publisher    
Set-off is the unintentional transfer of substances used in printing from the external printed surface of food packaging to the inner, food-contact surface. Ambient Ionization Accurate Mass Spectrometry (AMI-AMS) detected and identified compounds from print set-off not visible to the human eye. AMI mass spectra from inner and outer surfaces of printed and non-printed food packaging were compared to detect and identify non-visible set-off components. A protocol to identify unknowns was developed using a custom open sourced database of printing inks and food packaging compounds. The protocol matched print related food-contact surface ions with molecular formula of common ions, isotopes, and fragments of compounds from the database. AMI-AMS was able to detect print set-off and identify 7 different compounds. Set-off on the packaging samples was confirmed using gas chromatographic mass spectrometric (GC-MS) analysis of single-sided solvent extracts. N-ethyl-2(and 4)-methyl-benzenesulfonamide, 2,4-diphenyl-4-methyl-1(and 2)-pentene and 2,4,7,9-tetramethyl-5-decyne-4,7-diol were present on the food contact layer at concentrations from 0.21 to 2.7 ± 1.6 µg·dm-2, corresponding to nearly mg·Kg-1 concentrations in the packaged food. Other minor set-off compounds were detected only by AMI-AMS, a fast, simple, and thorough technique to detect and identify set-off in food packaging.
Karim Bentayeb; Luke K Ackerman; Timothy H Begley
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-1-17
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  -     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-1-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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