Trace pesticide residue surface enhanced Raman spectrum detection method based on a nucleic acid aptamer
A technology for surface-enhanced Raman and nucleic acid aptamers, which is applied in Raman scattering, measurement devices, material analysis by optical means, etc., to achieve the effects of low synthesis cost, simple operation process, and improved detection sensitivity
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[0022] The present invention has generality for trace pesticide residues, but due to the wide variety of pesticides, the present invention only selects acetamiprid, which is the most widely used among mainstream pesticides, as an implementation example, and the detection of other pesticides can refer to the method of this implementation example.
[0023] The example implementation steps are described in detail in conjunction with the accompanying drawings.
[0024] (1) Preparation of gold nanoparticles
[0025] Gold nanoparticles were prepared by trisodium citrate heating reduction method. First, use freshly prepared aqua regia (1:3HNO 3 / HCl) soak the glassware required in the preparation, rinse with distilled water before use, and use after drying in the air. Next, take 0.0200g of chloroauric acid and add 100ml of ultrapure water to prepare a 0.02% (M / V) solution and place it in a three-necked flask, and use an electric heating mantle to perform condensation and reflux hea...
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