Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/198992
Type: Artigo de periódico
Title: Fast Screening And Secure Confirmation Of Milk Powder Adulteration With Maltodextrin Via Electrospray Ionization-mass Spectrometry [esi(+)-ms] And Selective Enzymatic Hydrolysis.
Author: Sanvido, Gustavo B
Garcia, Jerusa S
Corilo, Yuri E
Vaz, Boniek G
Zacca, Jorge J
Cosso, Ricardo G
Eberlin, Marcos N
Peter, Martin G
Abstract: Direct-infusion electrospray ionization-mass spectrometry [ESI(+)-MS] of several milk powder samples, confiscated by the Brazilian Federal Police, showed ions accounting for sodiated and potassiated molecules of disaccharides (m/z 365 and 381) as well as trisaccharides (m/z 527 and 543), whereas monosaccharide ions were not detected. The trisaccharide ions were not detected in samples of genuine milk powder, raising the suspicion that their presence indicates adulteration by the addition of maltodextrin. In control samples, maltose and maltotriose were hydrolyzed by alpha-glucosidase and not beta-galactosidase, whereas lactose was resistant to alpha-glucosidase but was hydrolyzed with beta-galactosidase. Samples suspected of being adulterated behaved in the same fashion, confirming the presence of maltose and maltotriose or maltodextrin. Direct-infusion ESI-MS is shown therefore to provide rapid screening of milk powder for adulteration with maltodextrin, whereas its combination with selective enzymatic hydrolysis provides highly reliable confirmation for unambiguous results.
Subject: Animals
Hydrolysis
Milk
Polysaccharides
Spectrometry, Mass, Electrospray Ionization
Alpha-glucosidases
Rights: fechado
Identifier DOI: 10.1021/jf1014445
Address: http://www.ncbi.nlm.nih.gov/pubmed/20695638
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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