| 摘要 |
PURPOSE:To measure ion activity with high accuracy by forming liquid distributing members of non-woven fabrics of long fiber cellulose and setting the distance between said members and ion selective electrodes at a specific distance or below, then supplying a measuring liquid to the electrodes. CONSTITUTION:A water impermeable member 30 is provided on the ion selective electrode pairs 261-263 and the liquid distributing members 321, 322 made of the non-woven fabrics of the long fiber cellulose are provided. A sample liquid is spotted from a spotting hole 361 of an upper cap 35 and a reference liquid from a spotting hole 362, respectively and the respective liquids are distributed by the liquid distributing members 321, 322. The measuring liquid is then passed through a liquid supplying hole 312, etc., and is penetrated to the surface of the ion selective electrode 262. The distance at which the measuring liquid from the liquid distributing members 321, 322 arrives at the ion selective electrode 262 is set at <=6mm. The potential difference between both terminals 272 and 275 of the ion selective electrode is measured and the ion activity in the measuring liquid is measured. The liquid distributing members are made of the cellulose and the distance thereof from the ion selective electrodes the hemolysis of blood cells is prevented and the ion activity and more particularly potassium ion activity is measured with high accuracy.
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