A method for determining the composition of solvents in e-cigarette liquid by gas chromatography-mass spectrometry
A technology of gas chromatography mass spectrometry and e-cigarette liquid, which is applied in the field of e-cigarettes, can solve the problems of inaccurate qualitative and other problems, and achieve the effects of high sensitivity, good linear relationship and accurate detection results
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[0041] The instruments and reagents used in this embodiment are as follows:
[0042] Instrument: Agilent7890B / 5977A gas chromatography-mass spectrometer (Agilent, USA), equipped with autosampler, chemical workstation; XP205 electronic balance (sensitivity: 0.0001g, Mettler-Toledo, Switzerland).
[0043] Reagents: ethanol, 1,2 propanediol, glycerol, diethylene glycol, tetraethylene glycol, pentaethylene glycol (purity>98%, Sigma-Aloririch, USA), triethylene glycol (purity>99%, TCI Japan) , 1,3-butanediol (purity 97.9%, American Chem-Service Company), methanol (chromatographically pure, American Dikma Company).
[0044] A method for determining the composition of solvents in electronic cigarette liquid by gas chromatography-mass spectrometry, comprising the following steps:
[0045] (1) Preparation of internal standard solution
[0046] Using 1,3-butanediol as the solute and methanol as the solvent, prepare an internal standard solution with a concentration of 500 μg / mL.
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