| 发明名称 | Method for proportioning nitrates and/or nitrites in a neutral medium | ||
| 摘要 | The present invention relates to a method for proportioning nitrate and/or nitrite ions in a solution using a copper electrode, said method being characterized in that it is carried out in constant potential mode and moreover in that it includes the steps of: i. applying a first potential to the copper electrode so as to reduce the copper oxides present on the surface of the metal copper electrode; ii. applying a second potential to the copper electrode so as to oxidize the metal copper formed in Step i into cupric ions; iii. applying a third potential to the copper electrode so as to reduce the copper oxides possibly formed in Step ii. Steps i through iii being carried out in a support electrolyte; and iv. proportioning the nitrate and/or nitrite ions of a solution to be analyzed by means of immersing the copper electrode, obtained in Step iii, in said solution to be analyzed while applying a fourth potential to the copper electrode so as to reduce the nitrate and/or nitrite ions, the support electrolyte of Steps i through iii, and the solution to be analyzed in Step iv, having a substantially neutral pH. | ||
| 申请公布号 | US9028670(B2) | 申请公布日期 | 2015.05.12 |
| 申请号 | US201013508109 | 申请日期 | 2010.11.17 |
| 申请人 | Centre National de la Recherche Scientifique | 发明人 | Debiemme Catherine;Cachet Hubert;Trong Long Thi Tuyet Maï{umlaut over ( )};Aouina Nizar |
| 分类号 | G01N27/38;G01N27/404 | 主分类号 | G01N27/38 |
| 代理机构 | Sofer & Haroun, LLP | 代理人 | Sofer & Haroun, LLP |
| 主权项 | 1. A method for titrating nitrate and/or nitrite ions in solution using a copper electrode, said method being carried out in potentiostatic mode and in including the stages consisting in: i. applying a first potential to the copper electrode, so as to reduce the copper oxides present at the surface of the electrode to copper metal, ii. applying a second potential to the copper electrode, so as to oxidize the copper metal formed in stage i to give cupric ions, iii. applying a third potential to the copper electrode, so as to reduce the copper oxides possibly formed in stage ii, stages i to iii being carried out in a supporting electrolyte, and iv. titrating the nitrate and/or nitrite ions of a solution to be analyzed, by immersion of the copper electrode obtained in stage iii in said solution to be analyzed, a fourth potential being applied to the copper electrode so as to reduce the nitrate and/or nitrite ions, the supporting electrolyte of stages i to iii and the solution to be analyzed of stage iv having a substantially neutral pH. | ||
| 地址 | Paris FR | ||