Chemical profile analysis method based on retention time locking-gas chromatography-quadrupole mass spectrometry-selected ion monitoring mode
A gas chromatography mass spectrometry, retention time technology, applied in analytical materials, scientific instruments, material separation, etc., can solve problems such as redundancy, complex chromatographic peak matching, and influence
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[0035] 1. Sample collection
[0036] Taking flue-cured tobacco samples as an example, a total of 61 flue-cured tobacco leaf samples from different origins were collected and baked at 40°C to constant weight. The tobacco leaves were destemmed, crushed, passed through a 40-mesh sieve, sealed in a ziplock plastic bag, and stored in a refrigerator at 4°C.
[0037] 2. Analysis method
[0038] 2.1 Production of quality control samples
[0039] Weigh out 0.5g from each smoke powder sample, mix them evenly, and generate a new sample, the quality control (QC) sample.
[0040] 2.2 Collection of total ion current chromatogram of quality control sample
[0041] (1) Extraction and derivatization: extraction solvent, water-methanol-acetonitrile (3:1:1, volume ratio). Accurately weigh 50 mg of the quality control sample into a 5 mL glass vial, add 2 mL of the extract, and sonicate for 60 min at 17°C. Centrifuge under 700g conditions, take 450μL of supernatant and transfer to a 1.5mL chromatographic ...
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