| 摘要 |
PURPOSE:To reduce electrode drift by providing a layer of a water-insoluble salt of the conductive metal on said metal, further providing an electrolyte layer having annions common to the annions of this insoluble salt thereon, and providing an ion selective layer thereon. CONSTITUTION:After 4g silver of 99.9% purity is put into a tungsten basket, a polyethylene terephthalate film substrate 1 of 100mum thickness is disposed in a vacuum vapor depositing device and is thereafter vapor deposited with the silver until the rate of evaporation thereof attains 7g/m<2>. Thence, 3g silver chloride of 99.5% is put in a vapor source and is vapor deposited until the rate of evaporation attains 2.5g/m<2>. Further, potassium chloride of 99.5% purity is put into the evaporating source and is vapor deposited on this silver chloride layer 3, until the rate of evaporation of potassium chloride attains 1.5g/m<2>. A potassium ion selective layer 5 is coated on the Ag/AgCl/KCl multilayer film formed by the vapor deposition in this way in such a manner that the thickness of the dry film attains 25mum, thereafter it is dried, whereby the potassium ion selective electrode film is made. |
