| 摘要 |
PURPOSE:To construct a concentration measuring instrument in a small-sized and simple constitution and, at the same time, to prevent measured results from being affected by the ambient temperature and electromagnetic induction. CONSTITUTION:A cylindrical cavity section K is provided on the axis of a cylindrical acrylic resin cell section 10 and both ends of the section 10 are sealed after put a pyrostat 20 in the section 10. The pyrostat 20 is constituted in such a way that the core of an optical fiber cable is partially exposed and the exposed part is covered with an aluminum tube, and then, the space between the aluminum tube and core is filled with an oleyl alcohol liquid. Then a sodium ion electrode 13, potassium ion electrode 14, and reference electrode 15 are installed through the peripheral wall of the section 10. A liquid specimen is supplied into the cavity section K from a liquid-specimen supplying tube 11 and the liquid is maintained at a fixed temperature by means of the pyrostat 20. Since the liquid specimen is directly brought into contact with the pyrostat 20 and the quantity of the supplied liquid can be reduced by making the space of the section K narrower, the liquid specimen can be heated to the fixed temperature immediately and measurement can be performed quickly.
|
