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      Reproducible Molecularly Imprinted Piezoelectric Sensor for Accurate and Sensitive Detection of Ractopamine in Swine and Feed Products

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          Abstract

          This paper describes the development of a reproducible molecularly imprinted piezoelectric sensor for the accurate and sensitive detection of ractopamine (RAC) in swine and feed products. The synthesized molecularly imprinted polymer (MIP) was directly immobilized on the surface of a quartz crystal microbalance (QCM) Au chip as the recognition element. The experimental parameters in the fabrication, measurement and regeneration process were evaluated in detail to produce an MIP-based piezoelectric sensor with high sensing capability. The developed piezoelectric sensor was verified to perform favorably in the RAC analysis of swine and feed products, with acceptable accuracy (recovery: 75.9–93.3%), precision [relative standard deviation (n = 3): 2.3–6.4%], and sensitivity [limit of detection: 0.46 ng g −1 (swine) and 0.38 ng g −1 (feed)]. This portable MIP-based chip for the piezoelectric sensing of RAC could be reused for at least 30 cycles and easily stored for a long time. These results demonstrated that the developed MIP-based piezoelectric sensor presents an accurate, sensitive and cost-effective method for the quantitative detection of RAC in complex samples. This research offers a promising strategy for the development of novel effective devices used for use in food safety analysis.

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          Most cited references 38

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          Molecularly imprinted polymers and their use in biomimetic sensors.

           K Mosbach,  K Haupt (2000)
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            Bioapplications for molecularly imprinted polymers.

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               Günter Wulff (2001)
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                Author and article information

                Journal
                Sensors (Basel)
                Sensors (Basel)
                sensors
                Sensors (Basel, Switzerland)
                MDPI
                1424-8220
                07 June 2018
                June 2018
                : 18
                : 6
                Affiliations
                Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China; panmf2012@ 123456tust.edu.cn (M.P.); singutosleep@ 123456126.com (R.L.); apple2ringo@ 123456126.com (L.X.); Yangjy0823@ 123456126.com (J.Y.); XY.Cui@ 123456163.com (X.C.)
                Author notes
                [* ]Correspondence: s.wang@ 123456tust.edu.cn ; Tel.: +86-22-6091-2493
                Article
                sensors-18-01870
                10.3390/s18061870
                6022169
                29880768
                © 2018 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

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