| 摘要 |
PURPOSE:To provide an optical ion sensor reducing the effect of an interfering ion, corresponding to a measuring ion with a high selectivity and showing the same dynamic range and linearity as a conventional electrochemical ion electrode. CONSTITUTION:A voltage-sensitive dye is added to the ion responsive membrane 2 used in an electrochemical ion electrode and a light source 4 and a photodetector 6 are arranged to detect the absorbancy change corresponding to the membrane potential change proportional to the logarithm of the concn. of the ion in a sample 3. |
