Fig. 1From: Electrochemical investigations and theoretical studies of biocompatible niacin-modified carbon paste electrode interface for electrochemical sensing of folic acidScanning electron micrograph images for bare/CPE (A) and NC/CPE (B). (C) CVs for the 1 mM of Fe2+/3+ in 1 M KCl as a supporting electrolyte at bare/CPE (curve a) and NC/CPE (curve c), the curve b represents the voltammogram in absence of analyte at NC/CPE; at scan rate of 0.05 Vs−1Back to article page