title: Polyaniline-graphene oxide nanocomposite sensor for quantification of calcium channel blocker levamlodipine.
abstract: A novel polyaniline-graphene oxide nanocomposite (PANI/GO/GCE) sensor has been fabricated for quantification of a calcium channel blocker drug levamlodipine (LAMP). Fabricated sensor has been characterized by electrochemical impedance spectroscopy, square wave and cyclic voltammetry, Raman spectroscopy and Fourier transform infrared (FTIR) spectroscopy. The developed PANI/GO/GCE sensor has excellent analytical performance towards electrocatalytic oxidation as compared to PANI/GCE, GO/GCE and bare GCE. Under optimized experimental conditions, the fabricated sensor exhibits a linear response for LAMP for its oxidation over a concentration range from 1.25μgmL(-1) to 13.25μgmL(-1) with correlation coefficient of 0.9950 (r(2)), detection limit of 1.07ngmL(-1) and quantification limit of 3.57ngmL(-1). The sensor shows an excellent performance for detecting LAMP with reproducibility of 2.78% relative standard deviation (RSD). The proposed method has been successfully applied for LAMP determination in pharmaceutical formulation with a recovery from 99.88% to 101.75%.
authors.affiliation: School of Studies in Chemistry, Jiwaji University, Gwalior - 474011, India. Electronic address: rajeevjain54@yahoo.co.in.
authors.forename: Rajeev
authors.initials: R
authors.lastname: Jain
authors.affiliation: School of Studies in Chemistry, Jiwaji University, Gwalior - 474011, India.
authors.forename: Ankita
authors.initials: A
authors.lastname: Sinha
authors.affiliation: School of Studies in Chemistry, Jiwaji University, Gwalior - 474011, India.
authors.forename: Ab Lateef
authors.initials: AL
authors.lastname: Khan
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D002121:Calcium Channel Blockers / Q000032:analysis* / Q000737:chemistry; D058266:Dielectric Spectroscopy; D055664:Electrochemical Techniques; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D057230:Limit of Detection; D053761:Nanocomposites / Q000737:chemistry*; D009525:Niacin / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry; D009994:Osmolar Concentration; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D015203:Reproducibility of Results; D012997:Solvents / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman
chemical_list: D000814:Aniline Compounds; D002121:Calcium Channel Blockers; D010087:Oxides; D012997:Solvents; C416807:polyaniline; C542574:levamlodipine; D009525:Niacin; D006108:Graphite
keywords: Electrochemical properties; Levamlodipine (LAMP); Nanocomposite; Polyaniline–graphene oxide modified glassy carbon electrode (PANI/GO/GCE)