title: A novel citrate selective electrode based on surfactant modified nano-clinoptilolite.
abstract: A citrate-selective sensor was prepared by modification of a PVC membrane with modified nano-clinoptilolite particles by hexadecyltrimethyl ammonium surfactant (SMZ). A Nernstian slope of 29.9 ± 0.2 mV per decade of citrate concentration was obtained over the concentration range of 5.0 × 10(-5)-5.0 × 10(-2) mol L(-1) of citrate. The electrode showed a fast response time (⩽ 10 s) and a detection limit of 1.3 × 10(-5) mol L(-1) of citrate. The linear range and detection limit were respectively changed to 1.0 × 10(-4)-5.0 × 10(-2) mol L(-1) and 1.0 × 10(-4) mol L(-1) of citrate when the micronized clinoptilolite particles were used.
authors.affiliation: Department of Chemistry, Shahreza Branch, Islamic Azad University, P.O. Box 311-86145, Shahreza, Isfahan, Iran.
authors.forename: Mahdieh
authors.initials: M
authors.lastname: Hasheminejad
authors.affiliation: Department of Chemistry, Shahreza Branch, Islamic Azad University, P.O. Box 311-86145, Shahreza, Isfahan, Iran; Razi Chemistry Research Center (RCRC), Shahreza Branch, Islamic Azad University, Isfahan, Iran. Electronic address: arnezamzadeh@iaush.ac.ir.
authors.forename: Alireza
authors.initials: A
authors.lastname: Nezamzadeh-Ejhieh
mesh_terms: D019343:Citric Acid / Q000737:chemistry*; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles; D017550:Spectroscopy, Fourier Transform Infrared; D013501:Surface-Active Agents / Q000737:chemistry*; D013694:Temperament; D017641:Zeolites / Q000737:chemistry*
chemical_list: D013501:Surface-Active Agents; C083175:clinoptilolite; D017641:Zeolites; D019343:Citric Acid
keywords: Citrate selective electrode; Nano clinoptilolite particles; Surfactant modified zeolite