A new solid-state mercury ion-selective electrode was prepared by directly coating the surface of a glassy carbon electrode with tetrahydrofuran solution containing PVC, 25,27-dihydroxy-26,28- bis[(1′-naphthalene) se...A new solid-state mercury ion-selective electrode was prepared by directly coating the surface of a glassy carbon electrode with tetrahydrofuran solution containing PVC, 25,27-dihydroxy-26,28- bis[(1′-naphthalene) selenopropoxy] calix[4]arene, dioctyl phthalate and potassium tetrakis(4-chlorophenyl) borate. The response of the electrode is linear with a good Nernstian slope of 31.5 mV/decade over an Hg 2+ ion concentration range of 5.0×10 -9—5.0×10 -2 mol/L and a detection limit of 1.0×10 -9 mol/L. The response time to achieve a 95% steady potential for Hg 2+ detection is less than 30 s, and the electrode is suitable for use within the pH range of 2—4. The selectivity for Hg 2+ relative to several alkali, alkaline earth, transition and heavy metal ions is good. The mechanism of the potential response of this system was also discussed.展开更多
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...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。展开更多
文摘A new solid-state mercury ion-selective electrode was prepared by directly coating the surface of a glassy carbon electrode with tetrahydrofuran solution containing PVC, 25,27-dihydroxy-26,28- bis[(1′-naphthalene) selenopropoxy] calix[4]arene, dioctyl phthalate and potassium tetrakis(4-chlorophenyl) borate. The response of the electrode is linear with a good Nernstian slope of 31.5 mV/decade over an Hg 2+ ion concentration range of 5.0×10 -9—5.0×10 -2 mol/L and a detection limit of 1.0×10 -9 mol/L. The response time to achieve a 95% steady potential for Hg 2+ detection is less than 30 s, and the electrode is suitable for use within the pH range of 2—4. The selectivity for Hg 2+ relative to several alkali, alkaline earth, transition and heavy metal ions is good. The mechanism of the potential response of this system was also discussed.
文摘以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。