DETERMINATION OF THE REAL ELECTROCHEMICAL SURFACE AREAS OF SCREEN PRINTED ELECTRODES

摘要

A method is provided for determining a real electrochemical surface area of a working electrode (WE) of a screen printed sensor. A concentration of a mediator incorporated in a WE paste is determined. The diffusion coefficient of the mediator is then ascertained. A final real electrochemical surface area of the WE is then made.

主权项

1. A method for sensing arrival and monitoring flow of a sample in a testing device, comprising:
providing a meter relay for sensing a sample arrival in the testing device that includes three electrodes for measurement of an analyte in a sample that includes a switch located in an analog or digital part of a circuit, the testing device including a reference electrode lead, a counter electrode lead, and a working electrode lead; in a start condition having a counter relay open; using first and second electrodes in an auto-trigger function; starting a measurement when the sample wets the second electrode until a current reaches a threshold level of from 50 to 2,000 Na; closing counter relays of the testing device when a threshold level is reached.