The electrochemical behavior of the film of single wall carbon nanotube(SWNT) functionalized with carboxylic acid group was studied extensively at the glassy carbon(GC) electrode. One stable couple of waves correspond...The electrochemical behavior of the film of single wall carbon nanotube(SWNT) functionalized with carboxylic acid group was studied extensively at the glassy carbon(GC) electrode. One stable couple of waves corresponding to the redox of the carboxylic acid group, which was supported by the IR experiments, was observed. The electrode process involved four electrons, while the rate determining step was a one-electron reduction. The SWNT film modified electrode showed nice electrocatalytic behaviors toward the oxidations of some biomolecules such as dopamine, epinephrine and ascorbic acid.展开更多
建立了羧基化碳纳米管固相萃取-液相色谱-串联质谱联用检测环境水体中四溴双酚 A 和双酚 A 的方法。比较了多壁碳纳米管、C60和羧基化多壁碳纳米管作为固相吸附剂对水体中四溴双酚 A 和双酚 A 的吸附效率。固相萃取浓缩后的样品经 Therm...建立了羧基化碳纳米管固相萃取-液相色谱-串联质谱联用检测环境水体中四溴双酚 A 和双酚 A 的方法。比较了多壁碳纳米管、C60和羧基化多壁碳纳米管作为固相吸附剂对水体中四溴双酚 A 和双酚 A 的吸附效率。固相萃取浓缩后的样品经 Thermo Scientific Hypersil C18色谱柱（150 mm±4.6 mm，3μm）分离，采用串联质谱负离子模式进行检测。结果表明，四溴双酚 A 和双酚 A 在0.02～1.0 mg / L 范围内具有良好的线性关系（ r2≥0.99），空白样品中的检出限（S / N =3）分别为0.04μg / L 和0.2μg / L。将所建立的方法应用于实际环境水体中四溴双酚 A和双酚 A 的检测，添加回收率在82％～99％之间，精密度小于5.0％，该方法可用于复杂环境样品中痕量四溴双酚 A和双酚 A 的检测。展开更多
文摘The electrochemical behavior of the film of single wall carbon nanotube(SWNT) functionalized with carboxylic acid group was studied extensively at the glassy carbon(GC) electrode. One stable couple of waves corresponding to the redox of the carboxylic acid group, which was supported by the IR experiments, was observed. The electrode process involved four electrons, while the rate determining step was a one-electron reduction. The SWNT film modified electrode showed nice electrocatalytic behaviors toward the oxidations of some biomolecules such as dopamine, epinephrine and ascorbic acid.
文摘建立了羧基化碳纳米管固相萃取-液相色谱-串联质谱联用检测环境水体中四溴双酚 A 和双酚 A 的方法。比较了多壁碳纳米管、C60和羧基化多壁碳纳米管作为固相吸附剂对水体中四溴双酚 A 和双酚 A 的吸附效率。固相萃取浓缩后的样品经 Thermo Scientific Hypersil C18色谱柱（150 mm±4.6 mm，3μm）分离，采用串联质谱负离子模式进行检测。结果表明，四溴双酚 A 和双酚 A 在0.02～1.0 mg / L 范围内具有良好的线性关系（ r2≥0.99），空白样品中的检出限（S / N =3）分别为0.04μg / L 和0.2μg / L。将所建立的方法应用于实际环境水体中四溴双酚 A和双酚 A 的检测，添加回收率在82％～99％之间，精密度小于5.0％，该方法可用于复杂环境样品中痕量四溴双酚 A和双酚 A 的检测。
