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United States Department of Agriculture

Agricultural Research Service

Research Project: Innovative Materials for Use in Mycotoxin Detection

Location: Bacterial Foodborne Pathogens & Mycology Research Unit

Title: Evaluation of functionalized SBA-15 to reduce patulin levels in apple juice

Authors
item APPELL, MICHAEL
item JACKSON, MICHAEL

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: March 29, 2012
Publication Date: March 29, 2012
Citation: Appell, M.D., Jackson, M.A. 2012. Evaluation of functionalized SBA-15 to reduce patulin levels in apple juice [abstract]. American Chemical Society. AGFD 244.

Technical Abstract: Patulin is a low molecular weight mycotoxin associated with the apple rotting fungus, Penicillium expansum. This toxin possesses an electrophilic conjugated double bond system susceptible to formation of harmful adducts with important biomolecules, such as glutathione, proteins, and DNA. In this study, we investigate synthetically functionalized SBA-15 silica as a sorbent to reduce patulin levels in spiked apple juice samples. The organized mesoporous channels of SBA-15 are tuned to specific pore sizes and provide a means for more selective sorption. Functionalization of the SBA-15 with propylthiol residues reduced the pore size from 9 nm to 5.4 nm, and the propylthiol functionalized material was able to lower patulin levels in batch rebinding assays. The propylthiol-SBA-15 loses some of its ability to bind patulin at lower pH, however, the material reduced patulin levels in apple juice with incubation at 60 C for 24 hours. This study supports the use of insoluble materials containing thiol residues to reduce patulin levels in contaminated solutions.

Last Modified: 8/27/2014