J.-H. He 1, S.-T. Zhang 1, Y.-H. Cai 2, and Z.-R. Song 2, “ A Sensitive Electrochemical Sensor for the Detection of Formaldehyde Based on L-Alanine/Pt-Nanoparticles Modified Glassy Carbon Electrode”, ajc, vol. 25, no. 18, pp. 10121–10126, Mar. 2014.