When using the modifiedcarbon paste electrode (CPE) for electrochemical detection, most of the time the response is weak, how can we improve the response?
I think that one of the main factors is the used paraffin oil? What do you think of this?
well, many times is a matter of the paraffin to carbon ratio used. The name "carbon paste electrode" usually misleads people to think that the mixture should be a paste, when in reality the amount of paraffin should be quite small and the carbon remains like a loose powder that can be compresed to a solid homogeneus state. but, by my experience if the mixture looks like an actual paste then it has to much paraffin an the response is usually small
Paraffin could be the factor. but you should also consider the type of agent you modified your carbon with or the concentration of the element you want to detect.
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