“…The applications of graphene for the detection of glucose, cytochrome c (Cyt-c), nicotinamide adenine dinucleotide (NADH), hemoglobin (Hb), cholesterol, ascorbic acid (AA), uric acid (UA), dopamine (DA), and hydrogen peroxide (H 2 O 2 ) have been discussed (Kuila et al, 2011). Among all analytes, UA and DA are reported to be the biomarkers of Parkinson's disease (Cheemalapati et al, 2013;Cheng Xiang Lim et al, 2010;Ezhil Vilian et al, 2014;Hong Yan Yue et al, 2014;Ming Zhou and Dong, 2009;Palanisamy et al, 2013;Rajkumar et al, 2014;Shang et al, 2008;Sheng et al, 2012;Sun et al, 2011aSun et al, , 2011b.…”