一种硫酸根离子选择电极的研制

Research on Sulfate Selective Electrode

以季铵盐(氯化2,3,4-三(十二烷基)苯甲基三甲基铵)为电活性物质,以邻苯二甲酸二丁脂(DBP)为增塑剂,对-三氟乙酰苯甲羧基己基醚为添加剂,制作的PVC膜硫酸根离子选择性电极.实验结果表明,电极对硫酸根离子具有选择性好,响应性快,稳定性好的特点,其线性响应范围为1×10-1～ 1×10-5 mol/L,适宜的pH值为1.5～5.

In this paper, quaternary ammonium salt was treated as electrical active substance, dibutyl phthalate （DBP） was used as phthalic esters, and other chemical was used as additive, PVC membrane sulfate selective electrode was made for direct determine sulfate in natural water, which was of easy operational and fast response and good stability etc. Its linear response range was1×10^-1～1×10^-5mol/L, suitable pH range was between 1.5 ～5.