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近些年来,PVC膜离子选择电极的报导很多,但对于MnO_4~-,仅有液膜电极,尚未见PVC膜MnO_4~-电极问世。据潘景浩等报导,在碱性染料中,以乙基紫为大阳离子制成的数种离子缔合型负一价酸根电极性能良好。在此基础上我们初步试制成功了PVC膜MnO_4~-电极。该电极制作简便,性能较好,线性响应范围为1×10~(-1)-5×10~(-6)M,斜率为54mV/pMnO_4(20℃),检出下限为2.5×10~(-6)M。
In recent years, many reports of PVC membrane ion selective electrode, but for MnO_4 ~ -, only the liquid film electrode, no PVC film has been found MnO_4 ~ - electrode. According to Pan Jinghao and other reports, in basic dyes, ethyl violet as large cation made of several kinds of ion-association type negative arsenate electrode performance is good. On this basis, we preliminary trial successfully produced PVC membrane MnO_4 ~ - electrode. The electrode has the advantages of simple fabrication and good performance, and the linear response range is 1 × 10 -1 -5 × 10 -6 M with a slope of 54 mV / pMnO 4 (20 ° C.). The lower limit of detection is 2.5 × 10 -6. (-6) M.