CHED 352 |
| Trace determination of heavy metals is important in water analysis. Traditional methods include atomic absorption spectroscopy and inductively coupled plasma atomic emission spectroscopy; which require sample pretreatment and expensive complex instrumentation. Anodic stripping voltammetry (ASV) is more practical, due to its inexpensive, portable instrumentation and potentially high sensitivity. Most ASV methods require the use of mercury for heavy metal detection, which is undesirable due its toxicity. Gold electrodes are an alternative to mercury based systems, however these also may be costly. In the present work, inexpensive gold film electrodes will be prepared by electrodepositing Au(III) onto carbon fiber microelectrodes. The electrodeposited films will be characterized using scanning electron microscopy and electrochemistry. ASV analyses of Cd(II) and Pb(II) will be performed on standard solutions and water samples. The reproducibility of these films over several analyses will also be investigated. Finally, regeneration of the gold film will also be performed. |
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Undergraduate Research Poster Session: Analytical Chemistry
11:00 AM-1:00 PM, Monday, March 26, 2007 Hyatt Regency Chicago -- Riverside Center, Poster
Division of Chemical Education |