School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, PR China.
Colloids Surf B Biointerfaces. 2013 Jan 1;101:183-8. doi: 10.1016/j.colsurfb.2012.06.007. Epub 2012 Jun 19.
Directly electrochemically reduced graphene oxide (ERGO) was obtained by potentiostatic reduction of exfoliated graphene oxide sheets on a glassy carbon electrode (GCE). The ERGO-modified electrode (ERGO/GCE) displayed greatly improved voltammetric response to the amino acids l-tryptophane (Trp) and l-tyrosine (Tyr) compared with the chemically reduced graphene oxide (CRGO) modified electrode. The ERGO/GCE separated the voltammetric responses of ascorbic acid (AA) and uric acid (UA) from that of Trp and Tyr. It eliminated the interference from AA and UA. The electrode showed good reproducibility and was used to determine Trp and Tyr with linear ranges of 0.2-40.0 μmol L(-1)and 0.5-80.0 μmol L(-1), detection limits of 0.1 μmol L(-1) and 0.2 μmol L(-1), respectively.
直接电化学还原氧化石墨烯（ERGO）是通过在玻碳电极（GCE）上的剥落氧化石墨烯片的恒电位还原得到的。与化学还原氧化石墨烯（CRGO）修饰电极相比，ERGO 修饰电极（ERGO/GCE）对氨基酸 l-色氨酸（Trp）和 l-酪氨酸（Tyr）表现出大大改善的伏安响应。ERGO/GCE 将抗坏血酸（AA）和尿酸（UA）的伏安响应与 Trp 和 Tyr 的伏安响应分离。它消除了 AA 和 UA 的干扰。该电极显示出良好的重现性，并用于测定 Trp 和 Tyr，线性范围分别为 0.2-40.0 μmol L(-1)和 0.5-80.0 μmol L(-1)，检测限分别为 0.1 μmol L(-1)和 0.2 μmol L(-1)。
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