title: Sorption of ochratoxin A from aqueous solutions using β-cyclodextrin-polyurethane polymer.
abstract: The ability of a cyclodextrin-polyurethane polymer to remove ochratoxin A from aqueous solutions was examined by batch rebinding assays. The results from the aqueous binding studies were fit to two parameter models to gain insight into the interaction of ochratoxin A with the nanosponge material. The ochratoxin A sorption data fit well to the heterogeneous Freundlich isotherm model. The polymer was less effective at binding ochratoxin A in high pH buffer (9.5) under conditions where ochratoxin A exists predominantly in the dianionic state. Batch rebinding assays in red wine indicate the polymer is able to remove significant levels of ochratoxin A from spiked solutions between 1-10 μg·L(-1). These results suggest cyclodextrin nanosponge materials are suitable to reduce levels of ochratoxin A from spiked aqueous solutions and red wine samples.
authors.affiliation: Bacterial Foodborne Pathogens and Mycology Research Unit, United States Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, 1815 N. University St., Peoria, IL 61604, USA. michael.appell@ars.usda.gov
authors.forename: Michael
authors.initials: M
authors.lastname: Appell
authors.forename: Michael A
authors.initials: MA
authors.lastname: Jackson
mesh_terms: D000327:Adsorption; D003666:Decontamination / Q000379:methods; D005506:Food Contamination; D006863:Hydrogen-Ion Concentration; D009793:Ochratoxins / Q000032:analysis / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D016060:Sorption Detoxification / Q000379:methods*; D014867:Water / Q000737:chemistry*; D014920:Wine / Q000032:analysis / Q000382:microbiology; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D009793:Ochratoxins; D011140:Polyurethanes; D047392:beta-Cyclodextrins; D014867:Water; C025589:ochratoxin A