title: Poly(alizarin red)/graphene modified glassy carbon electrode for simultaneous determination of purine and pyrimidine.
abstract: In this work, a poly(alizarin red)/Graphene composite film modified glassy carbon electrode (PAR/Graphene/GCE) was prepared for simultaneous determination of four DNA bases (guanine, adenine, thymine and cytosine) without any pretreatment. The morphology and interface property of PAR/Graphene films were examined by scanning electron microscopy and electrochemical impedance spectroscopy. The PAR/Graphene/GCE exhibited excellent electrocatalytic activity toward purine (guanine and adenine) and pyrimidine (thymine and cytosine) in 0.1 M phosphate buffer solution (pH 7.4). Under optimum conditions, differential pulse voltammetry was used to detect the oxidation of purine and pyrimidine. The results showed that PAR/Graphene/GCE exhibited well-separated peaks, low detection limit, high sensitivity and wide linear range for simultaneous detection of purine and pyrimidine. The proposed sensor also has good stability and reproducibility. Furthermore, the modified electrode was applied for the detection of DNA bases in a fish sperm DNA sample with satisfactory results.
authors.affiliation: Department of Chemistry, Shanghai University, PR China.
authors.forename: Xi
authors.initials: X
authors.lastname: Ba
authors.forename: Liqiang
authors.initials: L
authors.lastname: Luo
authors.forename: Yaping
authors.initials: Y
authors.lastname: Ding
authors.forename: Zhen
authors.initials: Z
authors.lastname: Zhang
authors.forename: Yuliang
authors.initials: Y
authors.lastname: Chu
authors.forename: Bijun
authors.initials: B
authors.lastname: Wang
authors.forename: Xiaoqian
authors.initials: X
authors.lastname: Ouyang
mesh_terms: D000880:Anthraquinones / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D004566:Electrodes; D005898:Glass / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011687:Purines / Q000032:analysis*; D011743:Pyrimidines / Q000032:analysis*
chemical_list: D000880:Anthraquinones; D011108:Polymers; D011687:Purines; D011743:Pyrimidines; C010078:alizarin; D002244:Carbon; D006108:Graphite; C030986:pyrimidine; C030985:purine