| 摘要 |
PURPOSE:To enable simultaneous analysis of both organic acid ions and iorganic anions with single injection, by separating inorganic anions with a separation column after a solution to be measured is introduced into an ion removing column to analyze organic acid ions. CONSTITUTION:The first elution liquid in a tank 1a, the second elution liquid in a tank 1b and a removing liquid in a tank 1c flow through respective specified passages driven by feed pumps 2a, 2b and 2c. Then, a specified reference solution is injected into a weighing tube 57 from a connection port 54 of an injector 5. Thereafter, when the injector 5 is turned on and an internal passage is changed over as shown by the broken line, the reference solution is carried to the first elution liquid and reaches an ion removing column 7a via a precolumn 6a. Here, inorganic anions in the reference solution are removed and organic acid ions are separated to detect the conductivity thereof with a detector 8a. After a specified time, when the injector 5' is turned on and the internal passage is changed over as shown by the broken line, the inorganic anions are carried to the second elution liquid and reaches a separation column 7b via the precolumn 6b. After the separation of the inorganic anions, the conductivity thereof is detected with a detector 8b. |
