Patent ID: 6869512
Filing Date: 2005-03-22
Classification: G01N

Abstract:
1. A device for measuring ionic activity which comprises: a block of insulating material having a hollow space therein, a solution-receiving surface area in which a pair of openings for receiving a sample solution and a reference solution separately are provided, said openings connecting with the hollow space, a plurality of solution-supplying surface areas in each of which are provided a pair of openings for supplying to outside the device the sample solution and the reference solution separately, said openings connecting with the hollow space, said block being in the form of a rectangular parallelepiped having an upper surface on which the solution-receiving surface area is arranged, and other surfaces including a bottom surface and side surfaces on at least two of which solution-supplying surface areas are arranged; a bridge member provided on the solution-receiving surface area for electrically bridging the sample solution received in one opening and the reference solution received in another opening; a guide member placed in the hollow space which assists to transmit separately the sample solution received in the opening in the solution-receiving surface area to the openings on the solution-supplying surface areas for supplying to outside the device the sample solution and the reference solution received in the opening in the solution-receiving surface area to the openings on the solution-supplying surface areas for supplying to outside the device the reference solution; and a plurality of ion selective electrodes each having an ion selective membrane thereon each of which is placed on a different solution-supplying surface area under such condition that the ion selective membrane is brought into contact with the sample solution and the reference solution separately.