电化学2021，Vol.27Issue(2)：168-176,9.DOI:10.13208/j.electrochem.201247
鲁米诺/氨基磺酸电化学发光及其多巴胺检测应用
Luminol/Sulfamic Acid Electrochemiluminescence and Its Application for Dopamine Detection
摘要
Abstract
Herein,sulfamic acid(SA)was utilized,for the first time,to enhance significantly the luminol electrochemilumines-cence(ECL).With the S A concentration increased from 0.1 μmol·L-1 to 500 μmol·L-1 the ECL intensity increased proportionally.The developed luminol/SA ECL system was employed to detect dopamine(DA)based on its prominent quenching effect.The Stern-Volmer equation of Io/I= 1+Ksv[DA]could be applied to express well the quenching mechanism of DA in the luminol/SA ECL system.The calibration plot showed that the increase in the DA concentration from 0.5 to 20 μmol·L-1 decreased linearly the ECL intensity with a detection limit of 30 nmol·L-1.The luminol/SA ECL system was successfully carried out for DA detection in urine real sample by employing the standard addition method with the excellent recoveries of 103％～105％.Selectivity of the as-developed ECL system was also investigated by using uric acid,ascorbic acid,sugars and amino acids.The results indicated that the ECL intensities changed negligibly in the presence of other substances.关键词
电化学发光/氨基磺酸/鲁米诺/多巴胺Key words
electrochemiluminescence/sulfamic acid/luminol/dopamine引用本文复制引用
Tesfaye Hailemariam Barkae,Mohamed Ibrahim Halawa,Tadesse Haile Fereja,Shimeles Addisu Kitte,马显贵,陈业权,徐国宝..鲁米诺/氨基磺酸电化学发光及其多巴胺检测应用[J].电化学,2021,27(2):168-176,9.基金项目
This work was supported by the National Key Re-search and Development Program of China(No.2016YFA0201300),National Natural Science Foun-dation of China(Nos.21874126,and 21675148),and the Chinese Academy of Sciences(CAS)-the Acade-my of Sciences for the Developing World(TWAS)President's Fellowship Program. （No.2016YFA0201300）
