พลเชี่ยว ฉัตรชัย. “Modification of Carbon Paste Electrode with Hemin/Polypyrrole for Nitrite Determination in Drinking Water”. Progress in Applied Science and Technology 3, no. 2 (November 30, 2013): 38–44. accessed October 15, 2026. https://ph02.tci-thaijo.org/index.php/past/article/view/243232.