Luminescence · 2009 · 40 citations · 40 references
Natural SciencesChemistryMaterials ScienceAnalytical ChemistryElectrochemistryNanomaterialsElectroanalytical ChemistryElectrochemical DetectionElectrochemical SensorsElectrode MaterialsInorganic NanoparticlesNanosensorsElectrochemiluminescent BiosensorsGlassy Carbon ElectrodesMethod Detection LimitNanomaterial-based SensorsNanomaterial-enhanced DetectionNanomaterial-modified ElectrodesNanoparticle-based SensingSilica-based Nanoparticles
An electrochemiluminescence (ECL) approach for methamphetamine determination was developed based on a glassy carbon electrode modified with a Ru(bpy)₃ (2+)-doped silica nanoparticles/Nafion composite film. The monodispersed nanoparticles, which were about 50 nm in size, were synthesized using the water-in-oil microemulsion method. The ECL results revealed that Ru(bpy)₃ (2+) doped in silica nanoparticles retained its original photo- and electrochemical properties. The ECL intensity was found to be proportional to methamphetamine concentration over the range from 1.0 × 10(-7) to 1.0 × 10(-5) mol L(-1), and the detection limit was found to be 2.6 × 10(-8) mol L(-1). The proposed ECL approach was used to analyze the methamphetamine content in drugs.
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