Method for Voltametruc Electrochemical Analysis and Implementing Device Therefor

• US 20080190782A1
• Filed: 03/28/2006
• Published: 08/14/2008
• Est. Priority Date: 04/12/2005
• Status: Abandoned Application

• Current Assignee: Didier Floner, Florence Geneste, Olivier Lavastre
• Original Assignee: Didier Floner, Florence Geneste, Olivier Lavastre
• Inventors: Lavastre, Olivier, Floner, Didier, Geneste, Florence
• Application Number:
  US11/911,456
• Publication Number:
  US 20080190782A1
• Time in Patent Office: Days
• US Class Current: 205/775
• CPC Class Codes: G01N 27/48 using polarography, i.e. measuring changes in current under a slowly-varying voltage

Abstract

The invention concerns a method for voltammetric electrochemical analysis of a liquid solution, for detecting and/or assaying in said solution at least one chemical species. The invention is characterized in that the method includes the following steps: contacting a sample of said solution with a single analyzing support (10) having at least two working electrodes (12) each belonging to a separate electrochemical analysis cell, each analysis cell further including a counter-electrode (13) and a reference electrode; performing a single and different measurement of said sample in each of said analysis cells, by applying an independent and different potential to each of the working electrodes (12); producing at least one voltammogram of said sample, based on said measurements; deducing from said voltammogram data concerning the detection and/or assay of said at least one chemical species in said sample.

Claims

1-11. -11. (canceled)

12. A method for voltammetric electrochemical analysis of a liquid solution, which makes it possible to detect and/or assay at least one chemical species in said solution, comprising a step which consists in bringing a sample of said solution into contact with a single analysis support which has a plurality of working electrodes, each belonging to a separate electrochemical analysis cell, each analysis cell furthermore comprising a counter-electrode and a reference electrode;

characterized in that it comprises the following steps;

applying an independent and different potential to each of said working electrodes;

measuring, by means of a single and different measurement of said sample in each of said analysis cells, the current response at a time t that is constant for all of said analysis cells;

reconstructing at least one voltammogram of said sample, based on said measurements;

deducing, from said voltammogram, information relating to the detection and/or assaying of said at least one chemical species in said sample.

13. The method according to any one of claims 12 or 13, characterized in that said measurements carried out make it possible to implement at least one voltammetric analysis belonging to the group comprising:

potential step voltammetry;

normal pulse voltammetry; and

differential pulse voltammetry.

14. The method according to claim 12 or 13, characterized in that said measurements are carried out simultaneously by said analysis cells.

15. The method according to claim 12 or 13, characterized in that one counter-electrode and/or one reference electrode is common to all of said analysis cells.

16. The method according to claim 15, characterized in that said measurements are carried out in succession by said analysis cells.

17. The method according to any one of claims 12 to 16, characterized in that at least ten measurements are carried out.

18. The method according to any one of claims 12 to 17, characterized in that the working electrodes are chemically modified.

20. The method according to any one of claims 12 to 19, characterized in that said working electrodes are of the same type.

21. The method according to any one of claims 12 to 19, characterized in that said working electrodes are of different types.