Test to find difference in suction force during puffing. This test determines the amount of force that must be applied for a single puff.
This study investigated the performance of electronic cigarettes (e-cigarettes) and examined performance using different protocols. The airflow rate required to generate aerosol, pressure drop across e-cigarettes, and aerosol density were examined using different protocols.
Methodology puff protocol:
- The airflow rate required to produce the aerosol and the density of the aerosol can vary depending on the number of puffs.
- The total area of the air holes correlates with the 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 an aerosol, and the total number of puffs produced.
- With this protocol, aerosol density varied significantly between puffs and gradually declined.
- FOLLOWING TEST PROTOCOL: Also two copies of the same model may be tightened in different sequential tests with breaks between tests. One copy can operate or act the same in each test, while a second copy of the same model can produce little aerosol during the next test. Different performance characteristics of the two units may be due to manufacturing defects. There can be significant differences in the airflow rate required for aerosol production, pressure drop, cartridge life, and aerosol production. Variations in performance across brands indicate the need for better quality control of e-cigarette manufacturing.