利用壳聚糖薄膜修饰电极测定大气中的二氧化硫  

Determining sulfur dioxide in the atmosphere by film modified electrode with chitosan

作　　者：孙元喜[1] 周书敏[1] 周谷珍[1] 

机构地区：[1]湖南文理学院化学化工学院,湖南常德415000

出　　处：《湖南文理学院学报（自然科学版）》2011年第4期46-48,56,共4页Journal of Hunan University of Arts and Science(Science and Technology)

摘　　要：利用循环伏安法(CV)研究了壳聚糖薄膜修饰电极(CTS/GCE)测定SO32-的最佳条件.结果表明,在0.2mol/LHCl-KCl(pH=1.7)底液中,还原峰电流与SO32-的浓度在2.0×10-4～2.0×10-2mol/L范围内呈良好的线性关系,检测限达4.5×10-5mol/L.线性方程为ipc(μA)=1.34×104C(mol/L)+6.67,相关系数为0.9968.将该方法用于大气中二氧化硫的含量测定,取得满意的结果.Using cyclic voltammetry（CV）, the determining conditions of 8032- were studied by film modified electrode with ehitosan（CTS/GCE）. Experimental results shown, in 0.2mol/L KCl-HCl（pH=1.7） solution, CTS/GCE has a strong electrocatalytic reaction on redox of SO3 2-. The reducing-peak current shows a good linear relationship with concentration of SO3 2- in the range of 2.0×10-4 -2.0× 10-2mol/L with a detection limit of 4.5× 10^-5mol/L. The linear regress equation was ipc（uA）= 1.34× 10 4C （mol/L）＋6.67 and the linear correlation coefficient was 0.996 8. This method was used to determining sulfur dioxide in the atmosphere with satisfied results.

关 键 词：壳聚糖 薄膜修饰电极 SO3 2- 大气 

分 类 号：O657.1[理学—分析化学]