Disposable Sensor for Measurement of Vitamin B2 in Nutritional Premix, Cereal, and Milk Powder

Methodologies for the determination of vitamin B2 in food matrixes and a premix using simple sample conditioning steps coupled with a convenient and cheap electrochemical sensing device are presented. Electrochemical analysis based on differential pulse voltammetry (DPV) coupled to carbon electrodes gave a well-defined reduction peak at −0.42 V versus a Ag/AgCl quasi-reference electrode. Using a straightforward sample preparation step, vitamin B2 can be measured successfully in a nutritional premix and food products. Standard additions of riboflavin were used to confirm the analyte concentrations and to provide precision data. Keywords: Vitamin B2; voltammetry; screen-printed sensor; nutritional premix; corn flake cereal; milk powder