Electrochemical detection of gallic acid using carboxylic acid-functionalized carbon black integrated with an iron disulfide nanocomposite for sensitive and selective analysis of natural food samples - Nithishkumar Marimuthu; Arunkumar Selvam; Huda F. Khalil; Mohammed M. Algaradah; Vairamuthu Raj; Chih-Yu Kuo; Mani Govindasamy (Food Chemistry, 2026)