dc.contributor.author	Suloff, Eric Charles	en
dc.contributor.committeemember	Blakistone, Barbara A.	en
dc.contributor.committeemember	Long, Timothy E.	en
dc.contributor.committeemember	Duncan, Susan E.	en
dc.contributor.department	Food Science and Technology	en
dc.date.accessioned	2014-03-14T20:19:45Z	en
dc.date.adate	2002-12-06	en
dc.date.available	2014-03-14T20:19:45Z	en
dc.date.issued	2002-11-21	en
dc.date.rdate	2003-12-06	en
dc.date.sdate	2002-12-04	en
dc.description.abstract	The quality of many beverages and food products is compromised by the presence of low molecular weight aldehydes. Aldehydes are commonly formed during storage by the oxidation of lipids or are introduced as migrants from polymeric packaging material. The objective of this project was to evaluate the effectiveness of three aldehyde scavenging agents, blended into poly(ethylene terephthalate) (PET) films, in removing an aliphatic series of aldehydes from an acidified aqueous model solution (pH 3.6) during storage. Aldehyde concentration in solution was determined by an improved high performance liquid chromatography method involving the formation of aldehyde-hydrazine complexes by 2,4-dinitrophenylhydrazine. Storage of 25 μM mixtures of acetaldehyde, propionaldehyde, butyraldehyde, valeraldehyde, and caproaldehyde in contact with PET films blended with 5% poly(m-xylylene adipamide) (nylon MXD6), D-sorbitol, or alpha-cyclodextrin reduced the concentration of each aldehyde in solution by 21 to 90% after 14 days of exposure. D-sorbitol and alpha-cyclodextrin aldehyde scavenging PET films were the most effective treatments for the reduction of aldehydes from solution showing similar average reductions for the five aldehyde species of 11.4 and 13.8 μM, respectively. PET films blended with nylon MXD6 were less effective in removing aldehydes from solution showing an average reduction of 8.4 μM for the five aldehyde species. However, nylon MXD6 proved to the most efficient aldehyde scavenging agent tested. D-sorbitol and alpha-cyclodextrin blends include 45 and 17 times more aldehyde scavenging sites then nylon MXD6 blends, but only showed 26 and 39% improvements in aldehyde scavenging ability when compared to nylon MXD6 blends. Aldehyde scavenging films demonstrated selective scalping preferring smaller molecular weight aldehydes, such as acetaldehyde, propionaldehyde, and butyraldehyde, more than larger aldehydes, valeraldehyde and caproaldehyde. Partition coefficients for smaller aldehydes were 3 to 6 times greater for aldehyde scavenging films then control film.	en
dc.description.degree	Ph. D.	en
dc.identifier.other	etd-12042002-124439	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-12042002-124439/	en
dc.identifier.uri	http://hdl.handle.net/10919/29917	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	xbackmatter.pdf	en
dc.relation.haspart	chapter7.pdf	en
dc.relation.haspart	chapter6.pdf	en
dc.relation.haspart	chapter5.pdf	en
dc.relation.haspart	chapter4.pdf	en
dc.relation.haspart	chapter3.pdf	en
dc.relation.haspart	chapter2.pdf	en
dc.relation.haspart	chapter1.pdf	en
dc.relation.haspart	afrontmatter.pdf	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	Active packaging	en
dc.subject	Diffusion	en
dc.subject	Migration	en
dc.subject	Milk	en
dc.subject	Off-flavors	en
dc.subject	Permeation	en
dc.subject	Scalping	en
dc.subject	Sorption	en
dc.title	Sorption Behavior of an Aliphatic Series of Aldehydes in the Presence of Poly(ethylene terephthalate) Blends Containing Aldehyde Scavenging Agents	en
dc.type	Dissertation	en
thesis.degree.discipline	Food Science and Technology	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	doctoral	en
thesis.degree.name	Ph. D.	en

Sorption Behavior of an Aliphatic Series of Aldehydes in the Presence of Poly(ethylene terephthalate) Blends Containing Aldehyde Scavenging Agents

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