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. 2019 Dec 19;128(4):1056–1058. doi: 10.1152/japplphysiol.00717.2019

Table 1.

pH, protonated and unprotonated nicotine in Blu and JUUL e-cigarettes

Nicotine Concentration (mM) Calculated pH Measured pH Protonated Nicotine (mM) Unprotonated Nicotine (mM)
Blu 148 (free base) 10.53 8.26 (SD 0.01) 44.3 103.7
JUUL 308 (benzoic salt) 6.05 6.0 (SD 0.03) 304 4