流动注射-化学发光法超灵敏测定甲基多巴  

Ultrasensitive Determination of Methyldopa by Flow Injection-Chemiluminescence

作　　者：张韫[1] 高苏亚[1] 

机构地区：[1]西安医学院药学院,陕西西安710021

出　　处：《分析科学学报》2015年第2期241-244,共4页Journal of Analytical Science

基　　金：国家自然科学基金(No.20975081);省级大学生创新训练计划(No.201211840005)

摘　　要：建立了快速、灵敏测定甲基多巴的流动注射-化学发光分析新方法。实验发现甲基多巴能显著猝灭鲁米诺-肌红蛋白体系的化学发光信号,且化学发光强度降低值与甲基多巴浓度的对数值呈良好的线性关系,线性范围为3.0-3.0×10^3 pg/mL,检出限（3σ）为1.0pg/mL。该方法成功用于人体唾液、尿液及血清中甲基多巴含量的测定,回收率为96.3%-104.1%,相对标准偏差（RSD）小于3.5%（n=7）。An ultrasensitive flow injection-chemiluminescence（FI-CL）method for the determination of methyldopa has been developed.It was found that methyldopa could quench the CL signals of luminolmyoglobin system,and the decrement of CL intensity was linearly proportional to the logarithm of methyldopa concentration ranging from 3.0to 3.0×10^3 pg/mL,with the limit of detection of 1.0pg/mL（3σ）.The proposed method has been successfully applied to the determination of methyldopa in human saliva,urine and serum with the recoveries ranging from 96.3% to 104.1% and the RSDs less than3.5%（n=7）.

关 键 词：甲基多巴 鲁米诺 肌红蛋白 化学发光 流动注射 

分 类 号：O657.39[理学—分析化学]