Fig. 9From: Nanomaterial-based environmental sensing platforms using state-of-the-art electroanalytical strategies(Left) Amperometric current responses of the successive addition of Cr(VI) in 0.1 M HCl solution. The inset is the enlarged part of low Cr(VI) concentration curve; (right) the calibration plot of the response against the Cr(VI) concentration (reprinted with permission from Reference Jin et al. 2014). © 2014 Royal Society of ChemistryBack to article page