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E-Cigarettes - Relationship between Wicking Rate and Other ENDS Design Parameters

Principal Investigators: Karen Coyne 

Funding Mechanism: Research Contract

ID number: HHSF223201810047I

Award Date: 9/21/2018

Institution: Research Triangle Institute International


As e-cigarettes have evolved, new models have increased user control of device settings, including a variety of choices in atomizers, atomizer coils, wicks, and airflow settings. If the wicking rate is insufficient, all of these parameters combined can cause a “dry puff,” essentially burning the wick and leading to an increase in carcinogenic carbonyls and other harmful and potentially harmful constituents (HPHCs). Currently, no published studies directly measure wicking rate and isolate the effects of other ENDS design parameters (e.g., puff topography, wattage, coil configuration, preheat time, wicking material and amount) on wicking rate. The goal of this study is to understand the impact of each of these design parameters on wicking rate and eventual production of HPHCs. Findings may inform future regulatory activities related to e-cigarettes.