Development of a sensitive and selective Riboflavin sensor based on carbon ionic liquid electrode.
The electrochemical properties of Riboflavin adsorbed on carbon ionic liquid electrode (CILE) were studied by cyclic voltammetry. A film with a surface coverage of up to 3.3x10(-9) mol cm(-2) was formed after 10 min exposure time. Electron transfer coefficient and rate constant of electron transfer across the modified electrode were found to be 0.43 and 3.03 s(-1), respectively. Differential pulse voltammetry was used for the determination of Riboflavin. Two linear working ranges of 0.8-110 nM and 0.11-1.0 microM were obtained with correlation coefficients of 0.998 and 0.996, respectively. The experimental detection limit was obtained as 0.1 nM. The relative standard deviation for five replicate analyses was 4.7%. Other soluble vitamins had no significant interferences and the electrode was used for the determination of Riboflavin in pharmaceutical products, nutrition and beverages.
Safavi
Afsaneh
A
Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran. safavi@chem.susc.ac.ir
Maleki
Norouz
N
Ershadifar
Hamid
H
Tajabadi
Fariba
F
D000327:Adsorption; D001628:Beverages / Q000032:analysis; D002244:Carbon / Q000737:chemistry*; D004563:Electrochemistry / Q000295:instrumentation*; D004566:Electrodes; D052578:Ionic Liquids / Q000737:chemistry*; D057230:Limit of Detection; D012256:Riboflavin / Q000032:analysis*; D014803:Vitamin B Complex / Q000737:chemistry
D052578:Ionic Liquids; D014803:Vitamin B Complex; D002244:Carbon; D012256:Riboflavin