盐酸左氧氟沙星在聚L-精氨酸/多壁碳纳米管修饰电极上的电化学行为  

Electrochemical behavior of levofloxacin hydrochloride at polymeric L-arginine/multi-walled carbon nanotubes modified electrode

作　　者：曾春梅[1] 李将渊[1] 年作权[1] 

机构地区：[1]化学合成与污染控制四川省重点实验室、西华师范大学化学化工学院,四川南充637002

出　　处：《化学研究与应用》2014年第10期1534-1538,共5页Chemical Research and Application

基　　金：西华师范大学科研启动基金项目(07B010)资助

摘　　要：运用循环伏安法、线性扫描伏安法、计时电量法等研究了盐酸左氧氟沙星在聚L-精氨酸/多壁碳纳米管修饰电极上的电化学行为。实验表明：盐酸左氧氟沙星在聚L-精氨酸/多壁碳纳米管修饰电极上的电极反应过程为等电子等质子吸附控制的不可逆过程,在pH=6．0的Na2 HPO4-NaH2 PO4支持电解质中,其氧化峰电流与浓度在7．0×10-6~1．0×10-4mol·L-1范围内呈良好的线性关系,相关系数R为-0．9992,检出限为5．0×10-6 mol·L-1,样品测定回收率为98．26%~101．70%。Electrochemical behavior of levofloxacin hydrochloride at polymeric L-arginine/multi-walled carbon nanotubes modified e-lectrode（PLA/MWNT/GC）was studied by cyclic voltammetry,linear sweep voltammetry and chronocoulometry. Results showed that levofloxacin hydrochloride at PLA/MWNT/GC exhibited an adsorptive and irreversible redox process with an electron transfer num-ber being equal to the proton number. In the Na2HPO4-NaH2PO4 supporting electrolyte with pH=6. 0,the oxidation peak current had a good linear relationship with the concentration in the range of 7. 0 × 10-6 ~1. 0 × 10-4 mol·L-1 with the correlation coefficient of-0. 9992 and detection limit of 5. 0×10-6mol·L-1. The recovery was between 98. 26%and 101. 70%.

关 键 词：修饰电极 L-精氨酸 多壁碳纳米管 盐酸左氧氟沙星 电化学行为 

分 类 号：O657.1[理学—分析化学]