| 摘要 |
PURPOSE:To measure various cations which generate an ion exchange reaction with high sensitivity and selectivity by using a specific compd. as the cation exchanger of a sensitive material. CONSTITUTION:The liquid film type cation electrode 1 consists of a supporting pipe 2, a lower outside pipe 3, an O-ring 4, an internal electrode 5, an internal liquid 6, a sensitive film 7, a cap 8, and a lead wire 9. The tetraphenyl boric acid deriv. shown in the formula is used as the cation exchanger of the sensitive material in the sensitive film 7. The ion exchange reaction takes place and the potential corresponding to the concn. of the cations is generated when the sensitive film 7 contg. the sensitive material is brought into contact with the liquid to be inspected. The concn. of the cations to be measured is measured by detecting this potential. |
