sorption of ochratoxin a from aqueous solutions using β-cyclodextrin-polyurethane polymer赭曲霉毒素a的吸附使用β-cyclodextrin-polyurethane聚合物水溶液.pdfVIP

Toxins 2012, 4, 98-109; doi:10.3390/toxins4020098 OPEN ACCESS toxins ISSN 2072-6651 /journal/toxins Communication Sorption of Ochratoxin A from Aqueous Solutions Using β-Cyclodextrin-Polyurethane Polymer Michael Appell 1,* and Michael A. Jackson 2 1 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 2 Renewable Product Technology Research Unit, United States Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, 1815 N. University St., Peoria, IL 61604, USA; E-Mail: michael.jackson@ * Author to whom correspondence should be addressed; E-Mail: michael.appell@; Tel.: +1-309-681-6249; Fax: +1-309-681-6672. Received: 14 November 2011; in revised form: 14 December 2011/ Accepted: 31 January 2012 / Published: 6 February 2012 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