The results obtained by which were identicalwith those obtained from the calculation by Debye-Hii ckel limited equation. It isproved that the K clay membrane potential really can reflect the response of simple ionactivity.

• 测定结果与Debye－Hiickel极限公式计算值符合，证明了钾粘土薄膜电位确能反映单独离子的活度。