Chinese Journal of Applied Chemistry ›› 1988, Vol. 0 ›› Issue (3): 77-80.

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THE EFFECTS OF PLASTICIZERS ON THE PERFORMANCE OF PVC MEMBRANE SODIUM ELECTRODE BASED ON 1,1,1-TRIS[1′-(2′-OXA-4′-OXO-5′AZA 5′-METHYL)DODECYL]PROPANE

Qian Guoying1, Wang Ruiling1, Wu Guoliang1, Tan Ganzu2, Xu Junzhe2, Jiao Tianquan2   

  1. 1. Qinghai Institute of Salt Lake, Academia Sinica, Xining;
    2. Lanzhou Institute of Chemical Physics, Academia Sinica
  • Received:1987-08-18 Revised:1987-12-02 Published:1988-06-10 Online:1988-06-10

Abstract: The effects of plasticizers and additives on the performance of PVC membrane sodium electrodes based on the title comPound, ETH 227,were investigated. It is shown that electrode with o-nitrophenyl octyl ether(2-NPOE) as plasticizer has the least KNa,+potK+(=3?10-3, but the interference of lipophilic anions or divalent cations is serious, the limit of Nernst resPonse is 3?10-4 mol·dm-3 NaCl. The linear response range of the electrode with didecyl phthalate as plasticiser, is from 3?10-4 to 1 mol·dm-3 NaCl,and KNa,+potK+<10-2. incorporating NaSCN would lower the internal resistance of membrane and improve the Interference-free ability for lipophilie anions.

Key words: Sodium ion-selective electrode, Plasticizer, Polyvinyl chloride, membrane