title: Determination of vanadium(V) with CdTe quantum dots as fluorescent probes.
abstract: CdTe quantum dots (QDs) were modified with thioglycolic acid (TGA) and synthesized in aqueous medium. The optimum fluorescence intensity was found to be at pH 6.24 with a CdTe QDs concentration of 4.96 x 10(-7) mol L(-1). The quenched fluorescence intensity of CdTe QDs is linearly proportional to V(V) concentration from 10 to 200 ng mL(-1) with correlation coefficient R = 0.9985. The limit of detection for V(V) was 2.07 ng mL(-1). The proposed method was successfully applied to the analysis of trace amounts of V(V) in water samples with recovery of 96.5-101.8%, and the results were in good agreement with those of electrothermal atomic absorption spectrometry.
authors.affiliation: College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China. glhou@glite.edu.cn
authors.forename: Ming
authors.initials: M
authors.lastname: Hou
authors.forename: Jia
authors.initials: J
authors.lastname: Na
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D057230:Limit of Detection; D053758:Nanoparticles / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D045663:Quantum Dots; D013691:Tellurium / Q000737:chemistry*; D014639:Vanadium / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D019187:Cadmium Compounds; D005456:Fluorescent Dyes; D014874:Water Pollutants, Chemical; D014639:Vanadium; D013691:Tellurium; C028337:cadmium telluride