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现行商品钠离子选择电极多为玻璃膜的。有关PVC膜钠电极已见文献[1—4]报导,但以冠醚为活性物质的钠离子电极仍不多见。本文以6.13-二甲氧基二苯并-14-冠-4为电活性物质研制了涂碳PVC膜钠选择性电极,并测试了其有关性能。其线性响应范围为1×10~(-5)—1M,级差55mv/PNa(25℃)。本电极具有坚固耐用,无需内参比电极,易于小型化,制备、使用简便等优点。
Currently available sodium ion selective electrode for the glass film. The PVC membrane sodium electrode has been reported [1-4] reported, but the crown ether as the active material sodium ion electrode is still rare. In this paper, 6.13-dimethoxy-dibenzo-14-crown-4 as electroactive substances developed carbon-coated PVC membrane sodium selective electrode, and tested its performance. The linear response range is 1 × 10 ~ (-5) -1M, with a step difference of 55mv / PNa (25 ℃). The electrode has the advantages of strong and durable, without reference electrode, easy to miniaturization, preparation, easy to use and so on.