Sample detection to initiate timing of an electrochemical assay
US6193873A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Jun 15, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/3273
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electrochemical assay includes a method for determining with great accuracy the time at which an applied sample bridges a gap between the electrodes of an electrochemical cell. The method involves applying a constant small current across the gap, while monitoring the potential difference between the electrodes. The time at which the sample bridges the gap is marked by a sharp drop in the potential. A constant voltage is applied after the sample is detected, and the current and/or charge through the sample is monitored over a period of time. From the measured current or charge, the analyte concentration of interest can be calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.