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以CO_3~(2-)为检测对象,发展了聚合物敏感膜电位型碳酸根传感器。采用3-辛基噻吩(POT)作为传导层的固体接触式电极技术,通过优化实验条件,构建了聚合物敏感膜CO_3~(2-)选择性电极,该电极对CO_3~(2-)检出限为7.0μmol/L,线性范围为1.0×10~(-5)~1.0×10~(-3)mol/L,能斯特响应斜率为-29.6 m V/decade。传感器已用于海水中CO_3~(2-)的测定。
Taking CO_3 ~ (2-) as the detection object, a polymer-sensitive membrane potential type carbonate sensor was developed. By using 3-octylthiophene (POT) as the conductive layer solid-state contact electrode technology, the polymer-sensitive membrane CO_3 ~ (2-) selective electrode was constructed by optimizing the experimental conditions. The limit of emission was 7.0μmol / L and the linear range was 1.0 × 10 -5 ~ 1.0 × 10 -3 mol / L. The Nernst response slope was -29.6 mV / decade. The sensor has been used for the determination of CO_3 ~ (2-) in seawater.