| 摘要 |
PURPOSE:To obtain an ion sensor having stable quality, by a method wherein an ion sensor substrate is coated with a volatile hydrophilic solvent solution containing a plurality of metal alkoxides corresponding to a desired ion responsive glass composition and each metal alkoxides are subjected to hydrolysis and subsequently subjected to heat treatment to form an ion responsive glass film. CONSTITUTION:10g mixed metal alkoxides containing Si(OC2H5)4, NaOCH3, Al(OC3H7)3 and B(OC2H5)3 respectively in a mole ratio of 49:22:19.5:9.5 is added to 10ml ethanol to be uniformly stirred and mixed to prepare a mixed metal alkoxides-containing solution which is, in turn, applied to the pH responsive surface 9 of a pH glass electrode cylinder 8 and hydrolyzed thereon to form a uniform gel like film on said pH responsive surface. In the next step, said gel like film is subjected to heat treatment to form a Na<+> ion responsive glass thin film 10 through dehydro-condensation. In the next step, an inner electrode 11 comprising Ag/AgCl is inserted into the electrode cylinder and a 140mM NaCl solution is injected thereinto as an internal liquid 12 to obtain a Na<+> ion selective glass electrode 13. |
