A Methylene Blue-Selective Membrane Electrode Using Methylene Blue-Phosphotungstate as Electroactive Material and its Pharmaceutical Applications

摘要

A methylene boue poly (vinyl chloride) membrane electrode based on methylene blue-phosphotungstate ion-pair complex as electroac- tive material is described. The linear response covered the range of 1 × 10~-3 - 1 × 10~-6 mol dm~-3. The electrode showed stability, good re- of 51.5 ± 0.8 mV/decade (pH range 3.0-10.0). The detection limit was 6.79 × 10~-7 mol dm~-3. The electrode showed stability, good re- producibility and a fast response. Interferences from common inor- ganic cations and some organic bases were negligible.