Department of Cell Biology and Neuroscience, University of California, Riverside, CA 92521, USA.
Nicotine Tob Res. 2011 Dec;13(12):1276-83. doi: 10.1093/ntr/ntr164. Epub 2011 Oct 12.
This study investigated the performance of electronic cigarettes (e-cigarettes), compared different models within a brand, compared identical copies of the same model within a brand, and examined performance using different protocols.
Airflow rate required to generate aerosol, pressure drop across e-cigarettes, and aerosol density were examined using three different protocols.
First 10 puff protocol: The airflow rate required to produce aerosol and aerosol density varied among brands, while pressure drop varied among brands and between the same model within a brand. Total air hole area correlated with pressure drop for some brands. Smoke-out protocol: E-cigarettes within a brand generally performed similarly when puffed to exhaustion; however, there was considerable variation between brands in pressure drop, airflow rate required to produce aerosol, and the total number of puffs produced. With this protocol, aerosol density varied significantly between puffs and gradually declined. CONSECUTIVE TRIAL PROTOCOL: Two copies of one model were subjected to 11 puffs in three consecutive trials with breaks between trials. One copy performed similarly in each trial, while the second copy of the same model produced little aerosol during the third trial. The different performance properties of the two units were attributed to the atomizers.
There was significant variability between and within brands in the airflow rate required to produce aerosol, pressure drop, length of time cartridges lasted, and production of aerosol. Variation in performance properties within brands suggests a need for better quality control during e-cigarette manufacture.
本研究调查了电子烟的性能，比较了同一品牌内不同型号之间的性能，比较了同一品牌内相同型号的复制品之间的性能，并使用不同的协议来检查性能。
使用三种不同的协议来检查产生气溶胶所需的气流速率、电子烟的压降和气溶胶密度。
前 10 口抽吸协议：产生气溶胶和气溶胶密度所需的气流速率因品牌而异，而压降因品牌和同一品牌内的相同型号而异。对于某些品牌，总空气孔面积与压降相关。吸烟协议：当品牌内的电子烟抽吸至耗尽时，通常表现相似；然而，在压降、产生气溶胶所需的气流速率和产生的总抽吸次数方面，品牌之间存在相当大的差异。使用此协议，气溶胶密度在抽吸之间变化显著，并逐渐下降。连续试验协议：一个模型的两个副本在三个连续试验中进行 11 次抽吸，试验之间有休息时间。在每次试验中，一个副本的性能相似，而同一模型的第二个副本在第三次试验中产生的气溶胶很少。两个单元不同的性能特性归因于雾化器。
在产生气溶胶所需的气流速率、压降、墨盒持续时间和气溶胶产生方面，品牌之间和品牌内部存在显著的可变性。同一品牌内性能特性的变化表明电子烟制造过程需要更好的质量控制。
