【摘要】 <正> 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^-1mol·dm^-3检出下限为1×10^-6mol·dm^-3,响应斜率为65mV,对Hg²⁺、Cu²⁺、Pb²⁺、Cd²⁺、Zn²⁺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.更多还原

【Abstract】 A new silver ion-selective electrode fabricated by coating a graphite rod with PVC membrane containing 13, 14-benzo-1, 4, 8, 11-tetrathia（l5-crown-4） （TTX） as neutral carrier is described. This electrode exihibited a linear response to the silver ions within the concentration range 5×10^-61×10^-1mol·dm^-3 with a slope of 65 mV at pH 1.0 to 5.5. The detection limit was 1×10^-6mol·dm³. The selectivity of Ag⁺ relative to Hg²⁺, Cu²⁺, Pb³⁺, Cd²⁺ and Zn²⁺ were 8×10^-2, 5×10^-3, 1×10^-4, 5×10^-4 and 1×10^-5 respectively, and the membrane resistance was lower than 1 MΩ. The principal behaviour was the same as that of the commercial silver electrode.更多还原