Surface enhanced Raman spectroscopy method for organo-chlorine pesticide residues of fruits and vegetables
A surface-enhanced Raman, pesticide residue technology, applied in Raman scattering, measurement devices, material analysis by optical means, etc., can solve the problems of submersion, low sensitivity, weak Raman scattering intensity, etc., to achieve accuracy and precision High degree of detection, improved detection accuracy, and minimal damage
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[0027] Example 1:
[0028] Taking the detection of the residual amount of apple pentachlorophenol as an example, the specific implementation of the present invention is described in detail.
[0029] The method for rapidly detecting organochlorine pesticide residues in fruits and vegetables includes 5 steps:
[0030] Step 1 The preparation method of the copper substrate is as follows: first cut the copper foil into small pieces of 0.5cm×0.5cm, then sonicate each in acetone, ethanol and ultrapure water for 10 minutes, and finally immerse the copper foil in 0.1M nitric acid. Remove the oxide layer on its surface. The processed copper foil is rinsed with ultrapure water and dried for later use.
[0031] Step 2: The deposition method of silver nanoparticles on the surface of copper foil includes the following two processes:
[0032] Process 1: The copper foil is soaked in 0.01M stannous chloride and 0.01M hydrochloric acid for 1 min, and dried at room temperature;
[0033] Process two: the ...
Example Embodiment
[0037] Example 2:
[0038] Taking the detection of the residual amount of apple pentachlorophenol as an example, the specific implementation of the present invention is described in detail.
[0039] The method for rapid detection of organochlorine pesticide residues in fruits and vegetables includes 5 steps:
[0040] Step 1 The preparation method of the copper substrate is as follows: first cut the copper foil into small pieces of 2.0cm×2.0cm, then ultrasonicate each in acetone, ethanol and ultrapure water for 30 minutes, and finally soak the copper foil in 0.5M nitric acid to Remove the oxide layer on its surface. The processed copper foil is rinsed with ultrapure water and dried for later use.
[0041] Step 2: The deposition method of silver nanoparticles on the surface of copper foil includes the following two processes:
[0042] Process 1: The copper foil is soaked in 0.05M stannous chloride and 0.05M hydrochloric acid for 5 minutes, and dried at room temperature;
[0043] Process ...
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