Anal. Chem. 1998, 70, 1141-1148
Electrochemical Sample Pretreatment Coupled On-Line with ICP-MS: Analysis of Uranium Using an Anodically Conditioned Glassy Carbon Working Electrode Jack R. Pretty, Douglas C. Duckworth, and Gary J. Van Berkel*
Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6365
Electrochemical flow cells may be used as on-line pretreatment systems for ICP-MS analysis, allowing signal enhancement via preconcentration with simultaneous elimination of problematic sample matrixes.1 This analytical methodology has been applied to a variety of elements using various cell designs operated in anodic stripping mode.2-6 The results have indicated the potential of this approach as a compliment or alternative to more traditional
ion-exchange or sorptive methods of on-line preconcentration/ cleanup for ICP-MS.7,8 Our work at Oak Ridge in this area has utilized a thin-layer, flow-by cell design, which proved highly efficient for matrix elimination and signal enhancement (>100 times relative to steady-state signal) while consuming small volumes of sample (
