Detection steps of pesticide residues in vegetables and fruits
1. Applicable to the determination of pesticide residues in vegetables and fruits 2. Instruments Homogenizer Oscillator Centrifuge Nitrogen blower or constant temperature heater; Solid phase extraction instrument; Chromatography instruments. 3. Sample preparation Take a small amount of sample for homogenization. Weigh a quantitative homogeneous sample and add a suitable solution Adjust the PH value in the measurement range. Add organic solvent, shake and extract for several minutes, centrifuge, collect the organic solvent, concentrate to dryness, and then re-dissolve the residue with a suitable solution, to be purified. 4. Purification Use a solid phase extraction column of appropriate specifications. 1. activation 2. Loading 3. Rinse 4. Elution 5. Chromatographic conditions Determine the conditions such as chromatographic column, flow rate, injection volume, detector, column temperature, flow ratio, etc., Used for the determination of samples. The above steps are not necessarily applicable to the detection of every pesticide residue in vegetables and fruits, please choose. The company has instruments for pesticide residue analysis. If you need it, please contact us.
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