title: Sensitive capillary electrophoretic determination of mercury species with amperometric detection at a copper electrode after cation exchange preconcentration.
abstract: A capillary electrophoretic method for the separation of four mercury species with amperometric detection was developed. Inorganic Hg2+, methyl-, ethyl-, and phenyl-mercury were complexed with L-cysteine and separated in a counterelectroosmotic mode in an electrolyte solution comprised of 20 mM sodium tetraborate at pH 9.5. Amperometric detection of separated species was achieved at passivated copper electrode under electrocatalytic oxidation conditions. The four mercury species were separated in less than 8 min with LODs ranging from 170 to 450 microg/L. Cation exchange preconcentration was used to decrease the LODs down to 1.7 microg/L.
authors.affiliation: Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Brno, Czech Republic. kuban0@mendelu.cz
authors.forename: Petr
authors.initials: P
authors.lastname: Kubán
authors.forename: Pavlína
authors.initials: P
authors.lastname: Houserová
authors.forename: Pavel
authors.initials: P
authors.lastname: Kubán
authors.forename: Peter C
authors.initials: PC
authors.lastname: Hauser
authors.forename: Vlastimil
authors.initials: V
authors.lastname: Kubán
mesh_terms: D002412:Cations / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D019075:Electrophoresis, Capillary / Q000295:instrumentation / Q000379:methods*; D007474:Ion Exchange; D008628:Mercury / Q000032:analysis*; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation / Q000379:methods*; D012680:Sensitivity and Specificity; D013997:Time Factors
chemical_list: D002412:Cations; D003300:Copper; D008628:Mercury