高灵敏度孔雀石绿选择电极的研制

Development of a Highly-Sensitive Malachite Green Selective Electrode

基于限进介质-分子印迹聚合物二维功能材料（RAM-MIPs）对孔雀石绿离子通量的抑制、特异性识别和排除基体干扰能力,以孔雀石绿—四苯硼钠离子缔合物为电活性物质,构建成PVC为基质膜的高灵敏度孔雀石绿选择电极。在pH 3pH 7.5溶液中,电极的线性范围为3.2×10-81×10-3mol/L,斜率为54.2 mV/pC,检出限为约7×10-9mol/L,选择性、精密度和准确度好。可用于水体、水产品中孔雀石绿的含量测定。

A PVC membrane malachite green（MG） selective electrode with high sensitivity was prepared with the ion-pair of malachite green-sodium tetraphenylborate as the electroactive substance,based on a two-dimensional functional material of restricted access media and molecularly imprinted polymers（RAM-MIPs）,which could inhibit ion flux of MG,recognize MG specifically,and eliminate the matrix interference.The electrode showed a linear Nernst response in the range of 3.2×10-8~ 1×10-3mol/L with pH 3~pH 7.5 and a slope of 54.2 mV/pC.The low limit of detection was about 7×10-9mol/L.With the better selectivity,precision and accuracy,this electrode was practicable for the analysis of MG in aquatic water and aquatic products.