Document Detail

Determination of aromatic amines in food products and composite food packaging bags by capillary electrophoresis coupled with transient isotachophoretic stacking.
MedLine Citation:
PMID:  19524248     Owner:  NLM     Status:  MEDLINE    
A capillary electrophoretic method was explored to assay aromatic amines in food samples. With an inline-coupled transient isotachophoretic stacking approach, the method has yielded about 200-fold improvement of sensitivity in UV detection of three primary aromatic amines and melamine. By using K(+) as a leading ion and Tris(+) as a terminating ion, a plug of 10 cm (equivalent to 0.44 microL) sample solution was allowed to introduce into a 60 cm (50 cm effective) capillary for separation, giving limits of detection down to 2.0 x 10(-8)M. Baseline separation was achieved within 10 min, with relative standard deviation of 0.41-0.75% (intra-day) or 1.2-1.5% (inter-day) for migration time and 3.8-4.3% (intra-day) or 5.2-6.7% (inter-day) for peak area. The method was directly applicable to assaying the melamine in powder milk samples, with recovery in between 92.0% and 107.1%. The method could also be applied to the analysis of trace primary aromatic amines migrating from composite food packaging bags after combination of a 10-fold off-line concentration step, with limit of detection down to less than 1 microg/L. By this method, 4,4'-diaminophenylmethane and 2,4-diaminotoluene were thus found in three types of composite food packaging bags.
Xiaoyu Wang; Yi Chen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-06-06
Journal Detail:
Title:  Journal of chromatography. A     Volume:  1216     ISSN:  1873-3778     ISO Abbreviation:  J Chromatogr A     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-10-06     Completed Date:  2010-01-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9318488     Medline TA:  J Chromatogr A     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  7324-8     Citation Subset:  IM    
Laboratory of Analytical Chemistry for Life Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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MeSH Terms
Amines / analysis*
Aniline Compounds / analysis
Animal Feed / analysis
Animals, Domestic
Electrophoresis / methods*
Electrophoresis, Capillary / methods*
Food Analysis / methods*
Food Packaging*
Linear Models
Milk / chemistry
Phenylenediamines / analysis
Reproducibility of Results
Sensitivity and Specificity
Triazines / analysis
Reg. No./Substance:
0/Amines; 0/Aniline Compounds; 0/Phenylenediamines; 0/Triazines; 101-77-9/4,4'-diaminodiphenylmethane; 108-78-1/melamine; 95-80-7/2,4-diaminotoluene

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