the currents in ( b ) and ( c ) are considered to be carried by na ions since they both reversed direction at the same potential which was on the average within 0.3 mv of the equilibrium potential for na ions , 10.4 mv at 0 degrees c and 11 mv at 16.5 degrees c , as estimated from measurements made with a cation-sensitive glass electrode.3 .
C0022023
ions
C0007447
cation