Square-Wave Voltammetric Determination of Nanomolar Levels of Linuron in Environmental Water Samples Using a Glassy Carbon Electrode Modified with Platinum Nanoparticles within a Dihexadecyl Phosphate Film
AUSTRALIAN JOURNAL OF CHEMISTRY（2015）
摘要
A new sensitive method for linuron determination using a glassy carbon electrode modified with platinum nanoparticles within a dihexadecyl phosphate film (PtNPs-DHP/GCE) and square-wave voltammetry was proposed. The PtNPs-DHP/GCE was characterised by scanning electron microscopy and the diameter of the Pt nanoparticles was between 13 and 34nm. The electrochemical behaviour of linuron was studied using cyclic voltammetry and an irreversible anodic peak was obtained at a potential of 1.2V in 0.1molL(-1) phosphate buffer (pH 3.0) solution. The analytical curve, obtained by square-wave voltammetry after accumulation, was linear in the linuron concentration range from 1.0 to 74.0nmolL(-1), with a detection limit of 0.61nmolL(-1). This sensitive analytical method was successfully applied for linuron determination in environmental water samples with results that showed good agreement with those obtained using a comparative HPLC method.
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关键词
mass spectrometry,combinatorial,ionic liquids,organic chemistry,catalysis,colloids,polymer chemistry,enzymes,self assembly,amino acids,biosensors,medicinal chemistry,inorganic chemistry,crystal structures,sensors,surface chemistry,proteins,supramolecular chemistry,biocatalysis,green chemistry,nanotechnology,educational,peptide,photochemistry,computational chemistry,physical chemistry,ab initio calculations,biological chemistry,interfaces,analytical chemistry,spectroscopy,kinetics,quantum chemistry,electrochemistry,structure,density functional theory,combinatorial chemistry,macromolecules,reaction mechanisms,crystallography,pharmaceutical chemistry
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