Mogha Navin Kumar, Sahu Vikrant, Sharma Meenakshi, Sharma Raj Kishore, Masram Dhanraj T
Department of Chemistry, University of Delhi, Delhi, 110007, India.
Appl Biochem Biotechnol. 2014 Oct;174(3):1010-20. doi: 10.1007/s12010-014-0986-z. Epub 2014 May 31.
A simple strategy for the detection and estimation of ascorbic acid (AA), using lanthanum oxide-reduced graphene oxide nanocomposite (LO/RGO) on indium tin oxide (ITO) substrate, is reported. LO/RGO displays high catalytic activity toward the oxidation of AA, and the synergism between lanthanum oxide and reduced graphene oxide was attributed to the successful and efficient detection. Detection mechanism and sensing efficacy of LO/RGO nanocomposite are investigated by electrochemical techniques. Chronoamperometric results under optimal conditions show a linear response range from 14 to 100 μM for AA detection. Commercially available vitamin C tablets were also analyzed using the proposed LO/RGO sensor, and the remarkable recovery percentage (97.64-99.7) shows the potential application in AA detection.
报道了一种在氧化铟锡（ITO）衬底上使用氧化镧-还原氧化石墨烯纳米复合材料（LO/RGO）检测和估算抗坏血酸（AA）的简单策略。LO/RGO对AA的氧化表现出高催化活性，氧化镧与还原氧化石墨烯之间的协同作用归因于成功且高效的检测。通过电化学技术研究了LO/RGO纳米复合材料的检测机理和传感效能。最佳条件下的计时电流法结果表明，用于AA检测的线性响应范围为14至100μM。还使用所提出的LO/RGO传感器对市售维生素C片进行了分析，显著的回收率（97.64 - 99.7）表明了其在AA检测中的潜在应用。
