Sugar and Aldehyde Content in Flavored Electronic Cigarette Liquids

Area of Science:

• Analytical Chemistry
• Toxicology
• Public Health

Background:

• Sugars are common in traditional tobacco but their presence and related toxins in e-cigarette liquids are largely unknown.
• Electronic cigarettes (e-cigarettes) pose potential risks, necessitating an understanding of their chemical constituents.

Purpose of the Study:

• To quantify sugar and aldehyde (formaldehyde, acetaldehyde, acrolein) levels in various e-cigarette liquids.
• To investigate associations between sugars, aldehydes, and nicotine concentrations in e-cigarette liquids.

Main Methods:

• Analysis of 66 unheated e-cigarette liquid samples using liquid chromatography mass spectrometry and enzymatic test kits.
• Statistical analysis including generalized linear models, Fisher's exact test, and Pearson's correlation coefficient.

Main Results:

• Sugars (glucose, fructose, sucrose) and aldehydes (formaldehyde, acetaldehyde, acrolein) were detected in most samples, with sucrose and acetaldehyde being most prevalent.
• Significant correlations were found between certain aldehydes and sugars, but not between nicotine content and sugar/aldehyde levels.
• Acetaldehyde levels were significantly higher than formaldehyde and acrolein levels.

Conclusions:

• Sugars and aldehydes are present in unheated e-cigarette liquids.
• The identified compounds may influence initial experimentation and toxicity in users.
• Findings support informing regulations on e-cigarette flavor constituents and labeling.