measurements of intracellular ph ( phi ) in sheep purkinje fibers and of ph at the surface ( phs ) of sheep purkinje and rabbit atrial fibers with ph sensitive microelectrodes , showed a transient increase of ph and a sustained decrease of phi on replacement of 20mmol/l chloride by organic anions of weak acids ( at constant ph of the superfusion solution ) .
C0008203
chloride
C0003075
anions