Detection of veterinary drug residue parameters 222485

5 Instrument 5.1 Liquid chromatography tandem quadrupole mass spectrometer or equivalent, power distribution spray ion source. 5.2 High performance liquid chromatograph: equipped with a diode array detector or ultraviolet detector. 5.3 Analytical balance: Sensitivity 0.1 mg, 0.1 g. 5.4 Vortex mixer. 5.5 Low temperature centrifuge: with a maximum speed of 5000 r/min and a temperature control range of -40 ℃ to room temperature. 5.6 Blow nitrogen concentration instrument. 5.7 Solid phase extraction vacuum device. 5.8 pH meter; The measurement accuracy is 0.02.5.9. Organize the crusher. 5.10 Ultrasonic extractor. During the sample preparation and storage process, it is necessary to prevent contamination or changes in residual content of the sample. 6.1 Animal muscles, liver, kidneys, and aquatic products. Take approximately 500 g of all samples and thoroughly crush them with a tissue grinder. Place them in a clean container, seal and label them, and freeze them below -18 ℃. 6.2 Take approximately 500 g of milk samples from all the samples taken, mix well, place them in a clean container, seal them, and mark them. Freeze and store them below -18 ℃

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