A colorimetric assay that detects Cr3+ has been developed by Aiguo Wu, from the Ningbo Institute of Materials Technology and Engineering, and colleagues. By using tripolyphosphate functionalized gold nanoparticles a colour change from red to violet was observed. The test showed excellent selectivity, even when samples contained many other ions. Real water samples were tested with good agreement on tested results by ICP-AES.
Colorimetric detection of Cr3+ using tripolyphosphate modified gold nanoparticles in aqueous solutions
Junwei Xin, Lijing Miao, Shougang Chen and Aiguo Wu
Anal. Methods, 2012, Advance Article
DOI: 10.1039/C2AY25061F
