流动注射-化学发光法测定甲卡西酮  

Sensitive determination of furfural in food using poly ornithine electrochemical sensing

作　　者：刘唯琛 吕诗婧 张佳欣 牛卫芬 张潮[1] LIU Wei-chen;LV Shi-jing;ZHANG Jia-xin;NIU Wei-fen;ZHANG Chao(School of Forensic Medicine,Shanxi Medical University,Jinzhong 030600,China)

机构地区：[1]山西医科大学法医学院,山西晋中030600

出　　处：《化学研究与应用》2025年第3期702-705,共4页Chemical Research and Application

基　　金：国家重点研发计划项目(2021YFF0602504)资助。

摘　　要：建立了一种测定甲卡西酮的流动注射-化学发光新方法。在碱性条件下,甲卡西酮对铁氰化钾-鲁米诺化学发光体系的发光强度有显著的增敏作用,且在一定范围内,增强程度与甲卡西酮的浓度呈良好的线性关系。在本研究建立的方法下,检出限为1.1×10-4 g·L^(-1),甲卡西酮在1.2×10^(-4)~2.0×10^(-3)g·L^(-1)范围内,线性回归方程为Y=95.25c-37.38(r=0.9981,c为甲卡西酮的浓度);在2.0×10^(-3)~1.0×10^(-1)g·L^(-1)范围内时,线性回归方程为Y=2.840c+480.5(r=0.9922,c为甲卡西酮的浓度)。在生活污水中加标回收,分别对浓度为5.0×10^(-4)g·L^(-1)和2.0×10^(-3)g·L^(-1)的甲卡西酮溶液连续测定11次,其相对标准偏差(Relative standard deviation,RSD)为2.9%和4.7%。A poly-L-ornithine modified glassy carbon electrode was prepared and used for the determination of furfural.The results showed that the modified electrode catalyzed the electrochemical reduction of furfural.The preparation conditions of the electrode and the testing parameters were optimized through experiments.The reduction peak current of furfural exhibited a linear relationship with its concentration in the range of 2.00×10^(-7)to 1.00×10^(-4)mol·L^(-1),with a correlation coefficient of 0.9987,a detection limit of 2.50×10^(-8)mol·L^(-1),and a recovery rate ranging from 97.5%to 101%.The modified electrode demonstrated excellent sensitivity,selectivity,and stability,making it suitable for the determination of furfural content.

关 键 词：甲卡西酮 流动注射-化学发光 铁氰化钾 鲁米诺 

分 类 号：O657.3[理学—分析化学]