Electrochemical sensor for the specific detection of peroxyacetic acid in aqueous solutions using pulse amperometric methods
US6558529B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2000 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Feb 7, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/49
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electrochemical sensor (A, A′) is specific for the detection of peroxyacetic acid in a solution which also contains hydrogen peroxide. A potential is applied between a reference electrode (120, 120′) and a working electrode (118, 118′). A read voltage (FIG. 7) is selectively pulsed across a counter electrode (122, 122′) and the working electrode. The current flowing between the working electrode and the counter electrode is dependent on the peroxyacetic acid concentration in the solution (FIG. 6). By careful selection of the read voltage, the contribution of hydrogen peroxide to the current flow is virtually negligible. The sensor effectively measures peroxyacetic acid concentrations in the range generally employed in sterilization and disinfection baths (100-3000 ppm.).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.