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用合成的13,14-苯并-1,4,8,11-(15-冠硫醚-4)(TTX)为中性载体,溶于加有增塑剂邻苯二甲酸二辛酯(DOP)的聚氯乙烯(PVC)四氢呋喃(THF)溶液中制成涂膜溶液,将溶液涂布于石墨碳棒上制成银电极.其对银离子的线性响应范围为5×10~(-6)～1×10~(-1)mol·dm~(-3)检出下限为1×10~(-6)mol·dm~(-3),响应斜率为65mV,对Hg~(2+)、Cu~(2+)、Pb~(2+)、Cd~(2+)、Zn~(2+)的选择性系数分别为8×10~(-2)、5×10~(-3)、1×10~(-4)、5×10~(-4)、1×10~(-5),pH适用范围为1.0～5.5,内阻小于1MΩ.通过实验比较其主要性能与7601型商品银电极相近,在结构简单、制作方便及成本低廉等方面颇具特色.使用TTX作中性载体制成碳棒涂膜式银电极目前尚未见有报道.
Synthesis of 13,14-benzo-1,4,8,11- (15-crown thio-4) (TTX) as a neutral carrier, dissolved in plasticizer plus dioctyl phthalate DOP) in polyvinyl chloride (PVC) tetrahydrofuran (THF) to prepare a coating solution, and the solution was coated on a graphite carbon rod to form a silver electrode, and its linear response to silver ions was 5 × 10 ~ (- The detection limit of 1 × 10 ~ (-6) mol · dm ~ (-3) and the response slope of 65mV for Hg ~ (2) ~ 1 × 10 ~ (-1) mol · dm ~ The selectivity coefficients of Cu 2+, Pb 2+, Cd 2+ and Zn 2+ were 8 × 10 -2 and 5 × 10 ~ -3, 1 × 10 -4, 5 × 10 -4, 1 × 10 -5, pH range is 1.0-5.5, internal resistance is less than 1MΩ. The main performance Similar to 7601 commercial silver electrode, it is characterized by its simple structure, easy manufacture and low cost, etc. It has not been reported that TTX is used as neutral carrier to form carbon rod coated silver electrode.