title: A new silver(I)-selective electrode based on derivatized MWCNTs@SiO2 nanocomposites as a neutral carrier.
abstract: For the first time a novel carbon paste electrode (CPE) for the detection of trace silver(I) was designed by using derivatized silica-coated multi-walled carbon nanotubes (MWCNTs@SiO2) nanocomposites as a neutral carrier. This proposed electrode, with optimum composition, exhibits a wide dynamic range of 8.6×10(-8) to 1.0×10(-1) M toward silver(I) with a detection limit of 8.0×10(-8) M and a Nernstian slope of 60.8±0.2 mV dec(-1). Meanwhile, it also shows a good selectivity and a relatively fast response time (~20 s), a long lifetime (1 month) and a wide pH range (4.0-9.0). Finally, the developed CPEs were successfully applied in the potentiometric titration of potassium bromide and determination of Cl(-) ions in different water samples.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhao
authors.forename: Yaqin
authors.initials: Y
authors.lastname: Chai
authors.forename: Ruo
authors.initials: R
authors.lastname: Yuan
authors.forename: Ting
authors.initials: T
authors.lastname: Zhang
authors.forename: Chunli
authors.initials: C
authors.lastname: Yang
mesh_terms: D002244:Carbon / Q000737:chemistry; D004337:Drug Carriers / Q000737:chemistry*; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D057230:Limit of Detection; D053761:Nanocomposites / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry; D011199:Potentiometry / Q000379:methods; D012822:Silicon Dioxide / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*
chemical_list: D004337:Drug Carriers; D007477:Ions; D037742:Nanotubes, Carbon; D012834:Silver; D002244:Carbon; D012822:Silicon Dioxide