title: Voltammetric quantification of adenine and guanine at C60 modified glassy carbon electrodes.
abstract: Voltammetric determination of adenine and guanine has been carried out at C60 modified glassy carbon electrode at physiological pH. Well-defined oxidation peaks were observed with Ep at approximately 990 mV and 692 mV for adenine and guanine respectively. Good colinearity was obtained in the concentration range 0.5 microM to 100.0 microM for adenine and guanine with sensitivity of approximately 0.06 microA microM(-1) and approximately 0.03 microA /microM(-1), respectively. Simultaneous voltammetric determination of adenine and guanine has been described. Recovery studies for adenine and guanine in biological samples were also carried out. Interfering effect of some common metabolites including ascorbic acid has been evaluated. Analytical application of the developed protocol for determination of (G +C)/(A + T) ratio in DNA sample is also described.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
authors.forename: Rajendra N
authors.initials: RN
authors.lastname: Goyal
authors.forename: Sudhanshu P
authors.initials: SP
authors.lastname: Singh
mesh_terms: D000225:Adenine / Q000032:analysis* / Q000737:chemistry; D015374:Biosensing Techniques / Q000295:instrumentation / Q000379:methods*; D003460:Crystallization / Q000379:methods; D004247:DNA / Q000032:analysis* / Q000737:chemistry; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods; D037741:Fullerenes / Q000737:chemistry*; D006147:Guanine / Q000032:analysis* / Q000737:chemistry; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008839:Microelectrodes; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D037741:Fullerenes; D046911:Macromolecular Substances; D006147:Guanine; D004247:DNA; D000225:Adenine; C069837:fullerene C60