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Detection of Real-Time Tannic Acid Concentration Based-on Quasi-Static Centrifugal-and-Fluorescence Microfluid Technology

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In this study, an optoelectromechanical centrifugal-and-fluorescence microfluidic detection system with wireless transmission function is developed for measuring real-time tannic acid concentration based on the chemiluminescent and extinction reaction between tannic acid and luminal, oxidant and catalyst. The voltage response of fluorescence intensity detection has been experimented. The fluorescence intensity decreases by increasing concentration of tannic acid. Dynamic measurements show that the higher the concentration of tannic acid is, the shorter the reaction rise time and the longer the restored time have. The concentration of catalyst CuCl2 in 10−4 mol/l can provide optimal tannic acid detection for the concentration below 8 × 10−2 mol/l. Two segments linear approximation for calculating tannic acid concentration by measuring voltage is proposed. The sensitivities of −2616 mV/mol/l and −187 mV/mol/l are found to detect tannic acid concentration for the concentration below 1.07 × 10−2 mol/l and for the concentration between 1.07 × 10−2 and 8 × 10−2 mol/l, respectively. The advantages of the tannic acid detection method are low-cost, high sensitivity, less sample required, real-time inspection and rapid response as well as high accuracy to promise that the method can be applied in measuring tannic acid concentration of agriculture, food and medicine.
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Document Type: Research Article

Publication date: September 1, 2013

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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