Liquid chromatography-mass spectrometry method for detecting 45 veterinary drugs in pond sediment
A liquid mass spectrometry and sediment technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of lack of national standard methods and effective technical guidance, and achieve the effects of high sensitivity, small matrix interference, and strong purification effect
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[0021] The technical solutions of the present invention will be further described below with reference to specific embodiments, which are only used to explain the present invention, and are not intended to limit the present invention.
[0022] The technical scheme adopted in the present invention is:
[0023] 1) Extraction of samples: Take an appropriate amount of sediment sample, spread a layer evenly on the filter paper, place it in a cool and dry place, dry it in the dark, then collect the sample and crush it, accurately weigh 2.00g of the sample into a 50mL plastic centrifuge tube, add 0.4gNa 2 .EDTA, and 20 mL of mixed extraction reagent, vortex for 2 min, ultrasonic extraction for 20 min, centrifuge at 4000 r / min for 10 min, accurately measure 10 mL of supernatant, add distilled water to dilute to 50 mL, adjust pH to 2.8-3.0 with formic acid, and then purify;
[0024] 2) Solid phase extraction purification: 500mg / 6mL HLB solid phase extraction cartridge was sequentially...
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