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A Novel Fluorescent Sensor Based on Aptamer and qPCR for Determination of Glyphosate in Tap Water
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A Novel Fluorescent Sensor Based on Aptamer and qPCR for Determination of Glyphosate in Tap Water
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Journal Article
A Novel Fluorescent Sensor Based on Aptamer and qPCR for Determination of Glyphosate in Tap Water
2023
Overview
Glyphosate (GLYP) is a broad-spectrum, nonselective, organic phosphine postemergence herbicide registered for many food and nonfood fields. Herein, we developed a biosensor (Mbs@dsDNA) based on carboxylated modified magnetic beads incubated with NH2-polyA and then hybridized with polyT-glyphosate aptamer and complementary DNA. Afterwards, a quantitative detection method based on qPCR was established. When the glyphosate aptamer on Mbs@dsDNA specifically recognizes glyphosate, complementary DNA is released and then enters the qPCR signal amplification process. The linear range of the method was 0.6 μmol/L–30 mmol/L and the detection limit was set at 0.6 μmol/L. The recoveries in tap water ranged from 103.4 to 104.9% and the relative standard deviations (RSDs) were <1%. The aptamer proposed in this study has good potential for recognizing glyphosate. The detection method combined with qPCR might have good application prospects in detecting and supervising other pesticide residues.
Publisher
MDPI AG,MDPI
Subject
