Fig. 2From: Sensitive and selective determination of vitamin B2 in non-alcoholic beverage and milk samples at poly (glutamic acid)/zinc oxide nanoparticles modified carbon paste electrodeCyclic Voltammogram (CVs) of the electropolymerization of 0.1 M glutamic acid in 0.1 M PBS (pH 7) at ZnO–CPE in the potential range − 0.8 and 2.0 V for 7 cycles at scan rate of 50 mV s−1Back to article page