Novel cysteic acid/reduced graphene oxide composite film modified electrode for the selective detection of trace silver ions in natural waters

Publication Type:
Journal Article
Citation:
Analytical Methods, 2013, 5 (20), pp. 5812 - 5822
Issue Date:
2013-10-21
Metrics:
Full metadata record
Files in This Item:
Filename Description Size
2013001109OK.pdf992.81 kB
Adobe PDF
Novel cysteic acid/reduced graphene oxide composite film on a glassy carbon electrode has been prepared through the electrochemical oxidation of l-cysteine for silver sensing. Differential pulse anodic stripping voltammetry (DPASV) was employed for the detection of trace Ag(i) in aqueous solutions with the composite film modified electrode, which is referred to as an efficient method for the detection of trace heavy metals. We found the linear relationship between the peak current of the stripping voltammetry of Ag(i) and the concentration of Ag(i) in the range of 1.0 × 10-8∼ 2.0 × 10-4M with a correlation coefficient R2= 0.996, and the detection limit can be down to 1.0 × 10-9M (S/N = 3). The as-developed cysteic acid/reduced graphene oxide composite film modified electrode demonstrated ultrahigh sensitivity, reproducibility and recovery for the selective detection of trace Ag(i) without any interference from other metal ions. © 2013 The Royal Society of Chemistry.
Please use this identifier to cite or link to this item: