| 摘要 |
1,054,894. Ion-exchange testing. G. AMMER. Aug. 23, 1963 [Sept. 5, 1962; Aug. 7, 1963], No. 33419/63. Heading B1J. A water-softening by ion-exchange is controlled by measuring the concentration of specific alkali metal ions in the treated water by selective potential measurement e.g. with a calomel electrode and a glass electrode with a high sodium deficiency. This pair may be combined with a non-selective pair of electrodes. |
