CHED 293 |
| Redox Magnetohydrodynamics (MHD) has been used in conjunction with the anodic stripping voltammetry analysis (ASV) analysis of a solution containing 10-6 M As2O3 in order to enhance detection sensitivity. A large concentration of potassium ferricyanide (100 mM) was added to the solution to create a large cathodic current, which brought about a large Lorentz force when it was combined with the external magnetic field. This force aided in the stirring of the solution, which was evident by an increased current in a cyclic voltammogram (CV) in the presence of a 1.55 T magnetic field. However, there was no corresponding enhancement in the peak height for stripping waves of arsenic. The effect of various deposition potentials for ASV has also been investigated, and it was found that the optimal deposition potential depends on the type of electrode being employed. Although MHD-enhanced ASV was not immediately successful for As, it has been shown to work for several other heavy metals, and should prove to be a valuable technique for As once it is optimized. |
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Undergraduate Research Poster Session: Analytical Chemistry
11:00 AM-1:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Poster
Division of Chemical Education |