by their effect on electroconductivity of the blm the antibiotics could be divided into three groups : those having no effect on the blm electroconductivity at the maximum concentrations i.e . benzylpenicillin , carbenicillin , piperacillin ( at ph 6.0 and 7.0 ) and ampicillin ( at ph 6.0 ) , those insignificantly changing electroconductivity of the blm i.e . carfecillin and azlocillin and those having a significant effect on the blm electroconductivity i.e . ampicillin n-acyl derivatives and 6-apa .
C0004499
azlocillin
C0002680
ampicillin