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以CTMAB修饰碳糊电极将砷钼杂多酸固定于碳糊电极表面,使其表面形成了杂多酸薄膜.该电极对4.00×10~(-6)～1.00×10~(-3)mol/L范围的砷钼杂多酸有能斯特响应,斜率为47.5mV/pAs(v),从而可间接测定砷.
Arsenic-molybdenum heteropolyacid was immobilized on the surface of carbon paste electrode by CTMAB modified carbon paste electrode, and the heteropoly acid film was formed on the surface of the paste electrode.At the same time, 4.00 × 10 ~ (-6) ~ 1.00 × 10 ~ (-3) mol / L range of arsenic molybdenum heteropoly acid Nernst response with a slope of 47.5mV / pAs (v), which can be indirectly measured arsenic.