电分析化学仪.ppt

BAS EPSILON FOR ELECTROCHEMISTRY Features Techniques Procedures Features Potentiostat, galvanostat and potentiometer PC-controlled Windows multiple document interface Control of BAS accessories such as the BAS cell stands Wide current range Peak finding routine (auto and manual) Techniques Cyclic Voltammetry Chronoamperometry Chronocoulometry Chronopotentiometry Controlled Potential Electrolysis DC Potential Amperometry Open Circuit Potential Procedures Test Solution 2 mM potassium ferricyanide with 1 M potassium nitrate in water. Cell (C3 Cell Stand): Working Electrode :Platinum (PTE) (Black lead) Auxiliary Electrode :Platinum Wire (Red lead) Reference Electrode: Silver/Silver Chloride (White lead) Add 10-15 mL of the ferricyanide solution to the cell vial and place in the cell holder. . Turn the Power switch on the epsilon to on. Communication Open the epsilon software by clicking the epsilon icon. The CS Dialog box will appear, and will show the progress of establishment of the communication between the epsilon and the PC. If the link is established, the CS Dialog box will automatically disappear. If the link is not established, click the Retry button. If the link is lost after being established, use Reconnect Epsilon in the Experiment menu to reestablish the link. Electrodes  working electrode reference electrode auxiliary electrode Mechanical Polishing Polishing A few drops of fine polish, such as 1 mm diamond, or 0.05 mm alumina, are placed on a polishing pad, and the electrode is held vertically and rubbed on the polish in a figure of eight pattern for 30 seconds to a few minutes (depending upon the condition of the electrode surface) to obtain a mirror-like surface. Rinsing After polishing, the electrode surface is rinsed thoroughly with water (for alumina) or methanol (for diamond), and allowed to air dry (electrodes polished with alumina may also need to be sonicate