Journal
ELECTROANALYSIS
Volume 23, Issue 10, Pages 2386-2391Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201100111
Keywords
Catalytic-kinetic differential pulse voltammetry; Fruit juice samples; Thiourea; Janus green; Nanomolar level
Categories
Ask authors/readers for more resources
A new simple and highly selective and sensitive catalytic differential pulse voltammetry procedure for the determination of thiourea at nanomolar level is reported. Thiourea has a catalytic effect on the oxidation of Janus green by iodate in the hydrochloric acid medium. The potential was scanned in the negative direction and the differential pulse voltammograms were recorded. The variations of the peak current with hydrochloric acid concentration, oxidant, Janus green, pulse amplitude, pulse time and scan rate were optimized. Under the optimized conditions, the relationship between the peak current and concentration of thiourea was obtained. It is shown that the calibration curve is linear in the range of 0.0-1-6.00 mu g/mL. The detection limit of the method was 0.005 mu g/mL. The relative standard deviation for 6 replicate determinations of 0.01, 0.50 and 2.00 mu g/mL is equal to 2.25%, 1.52% and 1.03%, respectively. The method was applied to the determination of thiourea in fruit juices with satisfactory results.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available