Method for simultaneously determining content of 1,2-propylene glycol and glycerol in tobacco liquid of electronic cigarettes

Abstract

The invention discloses a method for simultaneously determining the content of 1,2-propylene glycol and glycerol in tobacco liquid of electronic cigarettes. The method comprises the following steps: step 1, preparing standard working solutions with gradient concentrations of 1,2-propylene glycol and glycerol; collecting Raman spectrums of the standard working solutions; establishing a standard curve of 1,2-propylene glycol and a standard curve of glycerol respectively according to characteristic peak intensities in the Raman spectrums and the concentrations of the standard working solutions; step 2, collecting a Raman spectrum of tobacco liquid of electronic cigarettes to be detected; and calculating to obtain the content of 1,2-propylene glycol and glycerol in the tobacco liquid of the electronic cigarettes according to the standard curves in the step 1. With the adoption of the method for simultaneously determining the content of 1,2-propylene glycol and glycerol in the tobacco liquid of the electronic cigarettes, provided by the invention, the sample does not need to be pre-treated, and the content of the 1,2-propylene glycol and the glycerol in the tobacco liquid of the electronic cigarettes can be rapidly and efficiently detected without loss.

Description

technical field [0001] The invention relates to the technical field of physical and chemical testing of electronic cigarette products, in particular to a method for simultaneously measuring the contents of 1,2-propanediol and glycerol in electronic cigarette liquid. Background technique [0002] Electronic cigarette (electrical cigarette, e-cigarette), also known as electronic nicotine delivery system (electronic nicotine delivery systems, ENDS), is a product that atomizes electronic cigarette liquid through an atomizer to deliver nicotine and / or other substances to the respiratory system. [0003] E-cigarette liquid is an important part of electronic cigarettes, and its main components are solvents, nicotine and flavoring substances. Generally, 1,2-propanediol and glycerol are the solvents of most e-cigarette liquids, and their total content accounts for about 90% of e-cigarette liquids. [0004] With the increasing sales of electronic cigarette products, it is very necess...

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Problems solved by technology

However, this method requires pretreatment of samples, which is not conducive to real-time online detection of a large number of samples.

[0007] Raman spectroscopy, as a rapid detection technology that has flourished in recent years, has the advantages of high efficiency, no pollution, no pretreatment, and non-destructive analysis. It has been widely used in many fields such as chemistry, biology, and materials, but it has not yet been used. Related reports on the determination of 1,2-propanediol and glycerol in e-cigarette liquid by Raman spectroscopy

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