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二硝基酚是化学工业的重要中间体。一般用比色法测定,但不宜用于浑浊试样。Selig曾试图用1,2,4,6-四苯基吡啶醋酸盐作滴定剂,电位滴定二硝基苯酚,未获成功。我们在前文基础上采用2,4-二硝基苯酚的四(十二烷基)铵或三(十二烷基)十六烷基铵离子对缔合物为电极活性物质,研制了PVC膜二硝基苯酚离子选择电极(DNP电极)。线性响应范围1×10~(-2)～1×10~(-5)M,斜率59mV。用它作指示电极,三辛基甲基氯化铵为滴定剂,以电位
Dinitrophenol is an important intermediate in the chemical industry. General colorimetric determination, but not for turbid samples. Selig tried to titrate dinitrophenol by titration with 1,2,4,6-tetraphenylpyridine acetate without success. Based on the above, we use 2,4-dinitrophenol tetrakis (dodecyl) ammonium or tridodecylammonium ion pair association as the electrode active material, developed a PVC film Dinitrophenol ion selective electrode (DNP electrode). The linear response range is 1 × 10 ~ (-2) ~ 1 × 10 ~ (-5) M with a slope of 59mV. Use it as an indicator electrode, trioctylmethylammonium chloride as a titrant to potential