title: Carbon nanotube composite coated platinum electrode for detection of Ga(III).
abstract: This study demonstrates the application of composite multi-walled carbon nanotube (MWCNT) polyvinylchloride (MWNT-PVC) based on 7-(2-hydroxy-5-methoxybenzyl)-5,6,7,8,9,10-hexahydro-2H benzo [b][1,4,7,10,13] dioxa triaza cyclopentadecine-3,11(4H,12H)-dione ionophore for gallium sensor. The sensor shows a good Nernstian slope of 19.68 ± 0.40 mV/decade in a wide linear range concentration of 7.9 × 10(-7) to 3.2 × 10(-2)M of Ga(NO(3))(3). The detection limit of this electrode is 5.2 × 10(-7)M of Ga(NO(3))(3). This proposed sensor is applicable in a pH range of 2.7-5.0. It has a short response time of about 10s and has a good selectivity over nineteen various metal ions. The practical analytical utility of this electrode is demonstrated by measurement of Ga(III) in river water.
authors.affiliation: Chemistry Department, College of Sciences, Shiraz University, Adabiat Crossroads, Shiraz 71456-85464, Iran. abbaspour@chem.susc.ac.ir
authors.forename: A
authors.initials: A
authors.lastname: Abbaspour
authors.forename: Seyyed Mehdi
authors.initials: SM
authors.lastname: Khoshfetrat
authors.forename: H
authors.initials: H
authors.lastname: Sharghi
authors.forename: R
authors.initials: R
authors.lastname: Khalifeh
mesh_terms: D004566:Electrodes; D005708:Gallium / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D007476:Ionophores; D008567:Membranes, Artificial; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010968:Plasticizers; D010984:Platinum / Q000737:chemistry*; D011143:Polyvinyl Chloride / Q000737:chemistry; D011199:Potentiometry; D015203:Reproducibility of Results; D014881:Water Supply / Q000032:analysis
chemical_list: D007202:Indicators and Reagents; D007476:Ionophores; D008567:Membranes, Artificial; D037742:Nanotubes, Carbon; D010968:Plasticizers; D010984:Platinum; D011143:Polyvinyl Chloride; D005708:Gallium