Platinum-loaded mesoporous nickel phosphonate and its electrochemical application for Sarcosine (cas 107-97-1) detection
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Add time:08/25/2019 Source:sciencedirect.com
In 2009, Sreekumar found that Sarcosine (cas 107-97-1), as an effective biomarker, can be used to identify prostate cancer. However, it is difficult to detect sarcosine in urine or plasma because of its low concentration. In this work, we describe a simple strategy for the preparation of sarcosine biosensor based on platinum-loaded mesoporous nickel phosphonate (Pt/MNP) and subsequently apply it to detect sarcosine. Mesoporous structure could increase the active sites on the MNP surface, which makes the Pt/MNP have excellent electrochemical performance for detecting hydrogen peroxide, one of the enzymatic products, and the sarcosine biosensor exhibited a superior electrochemical performance. The linear range of sarcosine biosensor is from 5 to 40 μM and the sensitivity is 123.51 μA mM−1 cm−2. The limit of detection is estimated to be 0.24 μM (S/N = 3). Additionally, the sarcosine biosensor based on Pt/MNP also shows an excellent performance in the anti-interference test and the real serum sample. This work manifests the potential application of Pt/MNP as a novel biosensor material for sarcosine detection, which could be extended to other oxidase-based detection systems.
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