A planar, electrochemical sensor having a substrate, conductive strips deposited on the substrate, and a dielectric layer insulating portions of the conductive strips except those portions which define a working electrode and at least one second electrode. The working electrode may be defined by an open printed region of the dielectric, or by a needle-punched or laser-burned hole or opening in the dielectric which exposes a small region of one of the conductive strips. A solid electrolyte contacting the electrodes is covered by a semipermeable membrane which may comprise an acrylonitrile butadiene copolymer or an acrylate-based copolymer. A sample chamber is defined by the membrane, a cover member, and a gasket therebetween, and has a volume of from about 1 to about 2 ml. The gasket is formulated from the highly cross-linked polymerization product of epichlorohydrin. All sensor components are selected such that a sensor operable for at least 2 days under normal conditions is produced.
一种平面电
化学传感器,具有一个基板、沉积在基板上的导电条和一个绝缘介质层,除了那些限定工作电极和至少一个第二电极的部分外,导电条的其他部分与介质层绝缘。工作电极可由电介质的开放印刷区域或电介质上的针刺或激光烧制的孔或开口来确定,这些孔或开口会露出其中一个导电条的小区域。接触电极的固体电解质被半透膜覆盖,半透膜可由
丙烯腈-
丁二烯共聚物或
丙烯酸酯基共聚物组成。样品室由薄膜、盖件和中间的垫圈构成,容积约为 1 至 2 毫升。密封垫由
环氧氯丙烷的高交联聚合产物制成。所有传感器部件都经过精选,这样生产出的传感器在正常条件下至少可工作 2 天。