| 摘要 |
Reference electrode comprises an alkaline conductor (1), an electrode (2), a hydrated gel (3), a hollow tube (4) and a lead wire (5). (1) is made of platinum or silver. (2) is a layer made of both silver halide and silver oxide and is formed surrounding (1). (3) contains an electrolyte salt of halide ions and is placed in (4). (4) is closed at one end by a liq.-junction portion which consists of a porous ceramic and at the other by a plug member. (5) is connected to (1) and passes through the liq. The porous ceramic contains silicate salt and carbon. (3) is selected from polyvinyl alcohol, polyacrylamide, gelatin, natural high polymer, starch etc. The halide ion is furnished in the form of NaCl. The liq-junction portion that close one of the ends of (4) can be a plug member (comprising an ion-permeable portion having a volume (0.01-6 mm3)) and diffusion coefficient (10 power (-7) -10 power (-10) cm2/sec.) predetermined as suitable for the electrolyte. The other end can be closed with a second plug member. If necessary (4) can be divided by a partitioning wall. |
