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用四苯鉮(Ph_4As)-AuCl_4或藏红T-AuCl_4作为电活性物质与不同溶剂做成聚氯乙烯(PVC)膜金离子选择性电极。最佳的膜组成是:Ph_4AsAuCl_40.010克;邻苯二甲酸二丁酯0.210克:PVC 0.170克。用此膜做成的电极对AuCl_4在1×10~(-5)—2×10~(-3)M范围内接近能斯特响应,检测下限为1.6×10~(-5)M,响应时间约1分钟(10~(-3)M时)电极寿命在四个月以上,稳定性和选择性良好,可用于矿石中金的测定。本文还对溶解度参数的应用作了初步探讨。
Poly (vinyl chloride) (PVC) membrane gold ion selective electrode was prepared by using tetraphenylphosphine (Ph_4As) -AuCl_4 or safranine T-AuCl_4 as electroactive substances with different solvents. The best film composition is: Ph_4AsAuCl_40.010 grams; dibutyl phthalate 0.210 grams: PVC 0.170 grams. AuCl_4 near the Nernst response in the range of 1 × 10 ~ (-5) -2 × 10 ~ (-3) M and the detection limit of AuCl_4 is 1.6 × 10 ~ (-5) M, Time of about 1 minute (10 ~ (-3) M) Electrode life of more than four months, good stability and selectivity, can be used for the determination of gold ore. This article also made a preliminary discussion on the application of solubility parameters.