| 摘要 |
A method and device have an electrode rod (1; 21) for a pH meter. The electrode rod (1; 21) has a measuring end (2; 22) for immersion into a liquid test sample (31), wherein the measuring end (2; 22) has a pH measuring element, and wherein electrical feed lines (5) in the electrode rod (1; 21) extend towards the pH measuring element. A plurality of capillaries (8, 9, 10; 23) for feeding liquids and gas into the test sample (31) extend in the electrode rod (1; 21) and have outlet openings (11, 12, 13; 24) in the area of the measuring end (2; 22). The method and device facilitate and accelerate preparation of liquid test samples and adjustment of a pH value for small amounts of test samples or narrow sample containers in NMR spectroscopy applications.
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