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A Rapid and Sensitive Chemical Screening Method for E-Cigarette Aerosols Based on Runtime Cavity Ringdown

Ruwini D Rajapaksha1, Mina W Tehrani2, Ana M Rule2

  • 1RingIR, 609 Broadway Blvd NE, Albuquerque, New Mexico 87102, United States.

Environmental Science & Technology
|May 21, 2021
PubMed
Summary

This study introduces a new method, runtime cavity ringdown spectroscopy (rtCRDS), to rapidly detect harmful chemicals in electronic cigarette aerosols. The findings show that common e-cigarette additives increase the generation of oxidative products.

Keywords:
JuulMolecular fingerprintingRuntime cavity ringdown spectroscopye-Cigarette aerosols

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Area of Science:

  • Analytical Chemistry
  • Environmental Health
  • Toxicology

Background:

  • Electronic cigarettes (e-cigs) like Juul are increasingly popular, but their chemical composition and health effects remain poorly understood.
  • There is a critical need for rapid analytical methods to study e-cig aerosols and their potential health risks.

Purpose of the Study:

  • To introduce and validate a novel analytical approach, runtime cavity ringdown spectroscopy (rtCRDS), for the rapid detection of oxidative products in e-cigarette aerosols.
  • To investigate the chemical composition of aerosols from Juul e-cigarettes and common e-liquid ingredients.

Main Methods:

  • Utilized runtime cavity ringdown spectroscopy (rtCRDS) for rapid analysis of e-cigarette aerosols.
  • Collected aerosols from vaping Juul e-liquids and spiked chemical additives (propylene glycol, vegetable glycerin, nicotine, ethyl maltol, benzoic acid, nicotine benzoate) in Tedlar gas bags.
  • Analyzed aerosols from single puffs of e-liquid.

Main Results:

  • Identified acetaldehyde, formaldehyde, and acetone as primary oxidative products in aerosolized propylene glycol/vegetable glycerin.
  • Detected ethanol as a major constituent in three commercial Juul flavors (Virginia tobacco, mango, menthol).
  • Observed increased spectral intensities of carbonyl compounds with the addition of common e-cig additives, indicating higher oxidative product generation.

Conclusions:

  • The developed rtCRDS method provides a rapid and direct approach for analyzing e-cigarette aerosols.
  • The study highlights that common e-cigarette additives can increase the formation of potentially harmful oxidative products.
  • This novel analytical technique can complement existing methods for studying vaping exposures and their associated health effects.