Batool Hoseini - Department of chemistry, Faculty of science, Tabriz Branch , Islamic Azad University, Tabriz, Iran.
Jafar Abolhasani - Department of chemistry, Faculty of science, Tabriz Branch , Islamic Azad University, Tabriz, Iran
ابراهیم احمدی - گروه شیمی - دانشکده علوم - دانشگاه زنجان
زهرا محمد نیا - گروه مهندسی شیمی - دانشکده مهندسی - دانشگاه زنجان

In this paper we report a simple and very sensitive method for determination of trace amounts of ethanol indrinks based on fluorescence quenching of TGA-capped CdS quantum dots .the quenching mechanismwas attributed to the non-radiative recombination due to the esterification reaction that occurs betweenethanol and carboxylic group of TGA. Under optimum conditions a wide linear dynamic rang was obtainedbetween 92 × 106 – 9.2 ×10-2 ng/L. The proposed method manifested several advantages such as highsensitivity, short analysis time, low cost and ease of operation.