title: Preconcentration and voltammetry of mercury on a functionalized sol-gel thin film modified glassy carbon electrode.
abstract: A functionalized sol-gel thin film modified glassy carbon electrode has been prepared for the determination of mercury. The tetrasulfide in the sol-gel matrix has a high affinity for mercury species. The chemically integrated functional groups in the sol-gel precursor ensure a high chemical and mechanical stability of the modified electrodes, and therefore a stable and reproducible analytical performance. By medium exchange anodic stripping voltammetry, this modified electrode allows reliable, low cost and interference-free determination of mercury.
authors.affiliation: Department of Chemistry, University of Puerto Rico, San Juan, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Guo
authors.forename: A R
authors.initials: AR
authors.lastname: Guadalupe
mesh_terms: D002138:Calibration; D002244:Carbon; D004563:Electrochemistry; D004566:Electrodes; D005782:Gels; D007202:Indicators and Reagents; D008628:Mercury / Q000032:analysis*; D015203:Reproducibility of Results; D013859:Thiocarbamates
chemical_list: D005782:Gels; D007202:Indicators and Reagents; D013859:Thiocarbamates; C077752:N,N'-bis(3-triethoxysilylpropyl)thiourea; D002244:Carbon; D008628:Mercury