By Anonymous on Tuesday, February 24, 2004 - 10:03 am:
I use electrochemical detectors in my research. Some problems have been found for the EC detector I am using. Sometimes the current of the baseline can not go down to zero but it's flat and smooth. If this is OK, should I read the final current at the peak or the difference between the current at the peak and the one at the baseline?Also,when I increase the applied potential,it takes a long time for the current to go down to the value at baseline.Does anyone know the possible reasons? Thank you in advance!
By Anonymous on Thursday, February 26, 2004 - 07:03 am:
Usually you never see a zero baseline. You ussually find a certain background current. This should be as low as possible of course. Peak integration is not influenced by the background current. Therefore you for peak hight you take max. current - background current.
A change in the applied potential usually take quite some time to reach the equilibrium at the working electrod surface again. It also changes the background current.