A simple colorimetric method for the quantification of Au(III) ions and its use in quantifying Au nanoparticles

摘要

A simple and sensitive method, based on the redox reaction between 3,3a€2,5,5a€2-tetramethylbenzidine and Au3+, for the quantification of Au3+ ions was developed. The method was successfully applied to the rapid and accurate quantification of Au-based nanoparticles.