Voltammetric method and apparatus

• US 5,686,829 A
• Filed: 05/18/1995
• Issued: 11/11/1997
• Est. Priority Date: 06/03/1994
• Status: Expired due to Fees

• Current Assignee: Metrohm AG (Metrohm Stiftung)
• Original Assignee: Metrohm AG (Metrohm Stiftung)
• Inventors: Girault, Hubert
• Primary Examiner(s): Karlsen, Ernest F.
• Assistant Examiner(s): DO, DIEP N
• Application Number:
  US08/444,011
• Time in Patent Office: 908 Days
• Field of Search: 204/400, 204/412, 204/415, 204/434, 324/72, 324/439, 324/450, 324/444-449
• US Class Current: 324/72
• CPC Class Codes: G01N 27/48 using polarography, i.e. measuring changes in current under a slowly-varying voltage

Abstract

During voltammetric analysis of liquids, the indicator electrode must be frequently changed in order to prevent memory effects and resultant changes to basic conditions during measurement. In order to be able to change the indicator electrodes simply, a plurality of indicator electrodes are arranged on a common carrier. For accommodation of the liquid (2) to be analysed, a vessel (1) is provided and the carrier (5) is mounted to move in relation to this vessel (1) in such a way that one of the indicator electrodes (6) can be selectively brought into the area intended for the liquid. The reference electrode (8) necessary for the measurement is arranged in the vessel (1) and likewise connected with the measuring device (20). With that, changing of the selected electrode (6) ensues by moving the carrier (5) relative to said vessel (1).

Claims