Selective Monitoring of Rutin and Quercetin based on a Novel Multi-wall Carbon Nanotube-coated Glassy Carbon Electrode Modified with Microbial Carbohydrates α-Cyclosophorohexadecaose and Succinoglycan Monomer M3

摘要

Multi-wall carbon nanotube (MWNT)-modified glassy carbon electrodes (GCE) were prepared for simultaneous determination of rutin and quercetin. Microbial carbohydrates, α-cyclosophorohexadecaose (α-C 16) and succinoglycan monomer M3 (M3) were doped into MWNTs to prepare a α-C 16-doped MWNT-modified GCE ((α-C 16 + MWNTs)/ GCE) and a M3-doped MWNT-modified GCE ((M3 + MWNTs)/GCE), respectively. The sensitivities of the (α-C16 + MWNTs)/GCE to rutin and quercetin were 34.7 μA·μM·cm and 18.3 μA·μM·cm , respectively, in a linear range of 2～ 8 μM at pH 7.2. The sensitivities of the (M3 + MWNTs)/GCE was 2.44 μA·μM~(-1)·cm~(-2) for rutin and 7.19 μA·μM·cm for quercetin without interference.