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钡离子选择电极的制备已有一些报道。以N,N,N′,N′-四苯基-1,11-二氧代-3,6,9-三氧杂十一烷二胺(即四甘酰双二苯胺,图1B)为中性载体,可制得稳定性好、寿命长的 PVC 膜钡离子电极。由于该电极受 pH 影响较大,抗 K~+、Sr~(2+)的干扰能力不强,在应用时受到了较多的限制。考虑到增加中性载体的亲脂性有可能改善电极的性能,我们进行了改变四甘酰双二苯胺结构的研究工作。本文报告用合成的四甘酰双[二(对辛基苯)胺]制成的 PVC 膜钡离子选择电极的性能和应用。此种电极比之四甘酰双二苯胺,选择性有些改善,pH 影响显著减小。
Preparation of barium ion selective electrode has been reported. N, N, N ’, N’-tetraphenyl-1,11-dioxo-3,6,9-trioxaundecanediamine (ie, tetrapentanoylbisdianiline, Figure 1B) Neutral carrier, can be prepared with good stability, long life PVC membrane barium ion electrode. As the electrode is greatly affected by pH, anti-K ~ +, Sr ~ (2+) interference ability is not strong, in application has been more limited. Considering that increasing the lipophilicity of the neutral carrier may improve the performance of the electrode, we have carried out the research work to change the structure of tetrapentanoyl dianiline. This paper reports the performance and application of a PVC membrane barium ion selective electrode made with synthetic tetrapentanoyl bis [di (p-octylphenyl) amine]. This electrode is somewhat more selective than tetraglycolodiphenylamine, with a significantly reduced pH effect.