莱克多巴胺在聚对氨基苯磺酸修饰的石墨电极上的电化学研究  

Electrochemical Properties of Ractopamine on the Graphite Electrode Modified with Poly p-Aminobenzene Sulfonic Acid

作　　者：武玲凤 孙淑红[1] 朱楠楠[1] 石雷[1] 王培龙[2] 苏晓鸥[2] 

机构地区：[1]辽宁师范大学化学化工学院,辽宁大连116029 [2]中国农业科学院农业质量标准与检测技术研究所,北京100081

出　　处：《化学试剂》2015年第8期683-686,758,共5页Chemical Reagents

基　　金：农业研究专项基金资助项目(201203088);国家科技基金资助项目(2011BAD26B0405)

摘　　要：以聚对氨基苯磺酸修饰廉价的石墨电极（PABSA/SG）制备检测莱克多巴胺（RAC）的电化学传感器,并采用循环伏安法（CV）、交流阻抗法（EIS）及差分脉冲法（DPV）对传感器进行了表征和研究。结果表明,在pH 7.5 PBS、富集时间30 s、脉冲振幅0.1 V、电压增幅0.008 V的最优条件下,该传感器灵敏度高、稳定性好,其线性范围为5.00×10^-7-5.00×10^-5mol/L,检出限达5.00×10^-7mol/L。将该传感器用于猪肉样品的检测,回收率为92.5%-108.7%。An electrochemical sensor for the detection of ractopamine was prepared, where the low-cost graphite electrode was modified by poly p-aminobenzene sulfonic acid. The sensor was characterized by CV,EIS and DPV. The results indicated that the sensor exhibited a high sensitivity and good stability with the linear range of 5.00 ×10^-7 -5.00 ×10^-5mol/L and the detection limit of 5.00×10^-7mol/L under the optimum conditions of pH 7.5 PBS, accumulation time of 30 s, pulse amplitude of 0. 1 V and voltage increase of 0. 008 V. The sensor was applied to the determination of raetopamine in the sample of the pork with the recovery between 92.5% - 108.7%.

关 键 词：聚对氨基苯磺酸 石墨电极 莱克多巴胺 电化学传感器 

分 类 号：O657.1[理学—分析化学]