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本文报道一种以十六烷基苄基二甲基铵(CBDMAC)-MnO_4~-为活性物质和邻苯二甲酸二丁酯(DBP)为增塑剂的PVC膜离子选择电极,性能良好。其线性响应范围为5×10~(-7)mol/L～1×10~(-1)mol/L,斜率61mV/pMnO_4,检测下限为3×10~(-7)mol/L,电极寿命为40d。用该电极测定了纸厂废水的化学耗氧量(COD)和生铁试样中的Mn含量,均得到了可靠的结果。
In this paper, a PVC membrane ion-selective electrode with cetylbenzyldimethylammonium (CBDMAC) -MnO_4 ~ - as active substance and dibutyl phthalate (DBP) as plasticizer was reported. The linear response range is 5 × 10 -7 mol / L to 1 × 10 -1 mol / L with a slope of 61 mV / pMnO 4 and the detection limit is 3 × 10 -7 mol / Life is 40d. The electrode was used to determine the chemical oxygen demand (COD) and the Mn content of the pig iron wastewater from the mill wastewater, all of which yielded reliable results.