Portable reconfigurable instrument for analytical determinations using disposable electrochemiluminescent screen-printed electrodes

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• 作者：M.A. Carvajal^a  ; [Author Vitae] ; J. Ballesta-Claver^b  ; [Author Vitae] ; D.P. Morales^a  ; [Author Vitae] ; A.J. Palma^a  ; [Author Vitae] ; M.C. Valencia-Miró ; n^b  ; [Author Vitae] ; L.F. Capitá ; n-Vallvey^b ; ^{lcapitan@ugr.es}  ; [Author Vitae]
• 关键词：Electrochemiluminescence ; Reconfigurable electronics ; Portable instrument ; Screen-printed electrode ; Luminol and ruthenium chemistries
• 刊名：Sensors and Actuators B ; Chemical
• 出版年：2012
• 期刊代码：161_09254005
• 类别：et
• 出版时间：5 July, 2012
• 卷：169
• 期：Complete
• 页码：46-53
• 文件大小：803 K

摘要

A portable reconfigurable instrument platform for electrochemiluminescence (ECL)-based disposable screen-printed electrodes is described. The reader unit consists of a potentiostat and a photodiode as a light-to-current converter integrated in the same instrument. For powerful and versatile analog conditioning, a very recent electronic solution has been included: a Field Programmable Analog Array (FPAA) capable of reconfiguring filter and gain stages in real time. To check the instrument's performance as a sensor platform, two luminophores (tris(2,2鈥瞓ipyridyl)ruthenium(II) and luminol) and two representative correactants widely used, triethylamine and cholesterol, were selected. The calibration functions obtained show a linear dependence with dynamic ranges from 0.05 to 10.0 mg l^鈭? for triethylamine, and 2.0路10^鈭?-1.4路10^鈭? M for cholesterol, with detection limits of 0.2 mg l^鈭? and 1.1路10^鈭? M, respectively, and a sensor-to-sensor reproducibility (relative standard deviation, RSD) of around 3.2%and 3.3%respectively at the medium-range level. This instrument offers a new advance in the portability of electrochemiluminescent determinations.