Yes. If the spike of the electrophoregram is inverse, I should change the signal.
poplar_yang(poplar_yang) 发表:usually if you setup in program 30KV, that means the sample inlet of capillary is negative -30KV, the signal outlet point is positive.
I don't have your machine, so I don't know, if you setup in your program -30KV, that will probably be: the sample inlet of capillary is positive +30KV, the signal outlet point is negative.