Accuracy of commercial electronic nicotine delivery systems (ENDS) temperature control technology

Autor: Aarthi Arab, Suvajyoti Guha, Matthew R. Myers, Seyed Ahmad Reza Dibaji, Bruce T. Murray
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Electronic Cigarettes
lcsh:Medicine
Social Sciences
010501 environmental sciences
Electronic Nicotine Delivery Systems
01 natural sciences
Habits
0302 clinical medicine
Thermocouple
Medicine and Health Sciences
Smoking Habits
Psychology
Public and Occupational Health
030212 general & internal medicine
Composite material
lcsh:Science
Materials
Flow Rate
Fluids
Multidisciplinary
Heating element
Physics
Temperature
Classical Mechanics
Volumetric flow rate
Dynamics
Nicotine Addiction
Boiling point
Thermocouples
Air Flow
Physical Sciences
Cements
Vapors
Engineering and Technology
Research Article
States of Matter
Nicotine
Materials science
Substance-Related Disorders
Thermometers
Materials Science
Equipment
Addiction
Fluid Mechanics
Temperature measurement
Continuum Mechanics
03 medical and health sciences
Aerodynamics
Boiling
Mental Health and Psychiatry
Binders
Humans
Measurement Equipment
0105 earth and related environmental sciences
Aerosols
Behavior
Temperature control
Nebulizers and Vaporizers
lcsh:R
Biology and Life Sciences
Fluid Dynamics
Electromagnetic coil
Mixtures
lcsh:Q
Zdroj: PLoS ONE
PLoS ONE, Vol 13, Iss 11, p e0206937 (2018)
ISSN: 1932-6203
Popis: Objectives For electronic nicotine delivery systems (ENDS), also commonly called e-cigarettes, coil temperature is a factor in the potential production of toxic chemical constituents. However, data are lacking regarding the temperatures that are achieved in the latest generation of these devices. Fourth-generation ENDS are capable of producing heating coil temperatures well above e-liquid boiling points, and allow the user to monitor and set the heating coil temperature during a puff. In this study, we evaluate the accuracy and consistency of the temperature measurement and control settings for different brands of fourth-generation ENDS. Methods A study was performed using three commercially available, fourth-generation ENDS. The atomizer coil temperatures were obtained from the device (using the EScribe software) reading and from thermocouples attached to the coils during simulated puffing conditions. In addition, aerosol temperatures were measured inside the atomizer and at the mouthpiece. Results Measured temperatures varied widely across samples taken from the same brand. For example, thermocouple measurements for one unit were 40 Celsius (°C) below the 300 °C set point, while another unit of the same brand exceeded the set point by more than 100 °C. We observed a significant variation in temperature (approximately 100 °C) along the length of the coil in some cases. Conclusions The possibility of wide temperature variation across ENDS samples, as well as variations between maximum coil temperatures and internal temperature readings, may have implications for studies that seek to determine correlations between coil temperature and toxin generation.
Databáze: OpenAIRE
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