摘要
利用5-(5-氰基-2-吡啶偶氮)-2,4-二氨基甲苯(5-CN-PADAT)与Pt(IV)生成稳定的络合物,采用循环伏安法,扫描电位范围为-1.35^-0.35 V,沉积35圈,制备了Pt NPs-5-CN-PADAT修饰电极。采用X射线粉末衍射法、场发射扫描电镜对其进行了表征,并研究了对苯二酚在该电极上的电化学行为。结果表明:在p H 2.0的磷酸盐缓冲溶液中,对苯二酚在该修饰电极上产生一对明显的氧化还原峰。基于此建立了一种测定对苯二酚的电化学传感新方法,对苯二酚浓度在3~100μmol/L范围内与峰电流呈线性关系,检出限为0.103μmol/L。方法用于实际样品的分析,回收率为97.0%~114.8%。
A stable complex was formed by 5-(5-cyano-2-pyridylazo)-2,4-diaminotolmuene(5-CN-PADAT)and platinum(IV).Subsequently,the Pt NPs-5-CN-PADAT modified electrode was prepared by using cyclic voltammetric method to deposit 35 cycles with a scanning potential range of-1.35-0.35 V.The morphology and composition of the modified electrode were characterized by X-ray diffraction and scanning electron microscope(SEM),and the electrochemical behavior of hydroquinone on the modified electrode was studied.The results showed that hydroquinone produced a pair of obvious redox peaks with the modified electrode in the phosphate buffer solution(pH 2.0).Based on this fact,an electrochemical sensing strategy was proposed for the determination of hydroquinone.A linear relationship between the peak currents and the hydroquinone concentration from 3 to 100μmol/L was obtained,and the detection limit was 0.103μmol/L.The method was successfully applied in actual samples with the recoveries from 97.0%to 114.8%.
作者
霍燕燕
雪瑶
武江艳
韩权
HUO Yanyan;XUE Yao;WU Jiangyan;HAN Quan(School of Chemical Engineering,Xi’an University,Xi'an 710065)
出处
《分析试验室》
CAS
CSCD
北大核心
2020年第10期1199-1202,共4页
Chinese Journal of Analysis Laboratory
基金
陕西省自然科学基金(2020JQ-886)
西安市科技计划项目(2020KJWL24,2019KJWL13)
2020年大学生创新项目(2902170146)
陕西省教育厅专项科研计划项目(18JK1152)资助。
