Portable Nanoparticle Based Assay For Rapid Detection of Food Antioxidants (NanoCerac)

摘要

Methods and assay for the portable colorimetric detection of an antioxidant in a food sample. According to one aspect the method comprises the steps of providing a colorimetric reagent comprising a plurality of ceria nanoparticles immobilized to a support, contacting the colorimetric reagent with the food sample, and detecting an optical property of the colorimetric reagent, wherein a change in the optical property of the colorimetric reagent is associated with the presence of antioxidant in the food sample, and further wherein the change in the optical property of the colorimetric reagent is dependent upon the concentration of the antioxidant in said food sample.