Method for detecting pesticide residues through stirring rod adsorption and extraction
A pesticide residue and stirring bar technology, applied in the field of analytical chemical detection, to achieve the effect of simple operation and reducing sample matrix interference
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[0019] The present invention is described by taking the detection of garlic as an example.
[0020] Instruments and reagents: TSQQuantumAccess high-performance liquid chromatography-tandem mass spectrometer from Thermo Company of the United States; HS260B electric shaker from IKA Company of Germany; CR22GⅢ high-speed refrigerated centrifuge from Hitachi Company of Japan; vortex mixer from IKA Company of Germany; R215 rotary mixer from BUCHI Company of Switzerland Evaporator. Stir bar: Polydimethylsiloxane (PDMS) coated. Methanol and acetonitrile are both chromatographically pure; experimental water is ultrapure water; anhydrous sodium sulfate (baked in a muffle furnace at 500°C for 5 hours before use, cooled, taken out and bottled for later use) and sodium chloride are analytically pure.
[0021] Standard products: Benalaxyl, Promethazine, Pyridaben, Tebufenpyr standard materials were purchased from Dr. Company in Germany.
[0022] Preparation of standard solution: Weigh 10 ...
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