The different binary solutions
were tested sequentially. The first
set of experiments measured the headspace concentration of nicotine
from binary mixtures with glycerol. A room with a stable temperature
control was used instead of an environmental cabinet to allow ease
of access when sampling. Room temperature was measured at each sampling
time using a Type K thermocouple and an Omega HH11B Digital thermometer
with 0.1 °C resolution. Offset was checked periodically against
ice water in a Dewar flask. Room temperature ranged from 296.25 to
297.85 K with a mean value of 297.25 K. The second set of experiments
measured the headspace concentration of nicotine from binary mixtures
with 1,2-propanediol. A walk-in environmental chamber set to 298.15
K/60% relative humidity was used, and headspace was sampled inside
the environmental chamber. Room temperature was measured at each sampling
time using a Type K thermocouple and ranged from 297.95 to 298.25
K with a mean value of 298.15 K.
were tested sequentially. The first
set of experiments measured the headspace concentration of nicotine
from binary mixtures with glycerol. A room with a stable temperature
control was used instead of an environmental cabinet to allow ease
of access when sampling. Room temperature was measured at each sampling
time using a Type K thermocouple and an Omega HH11B Digital thermometer
with 0.1 °C resolution. Offset was checked periodically against
ice water in a Dewar flask. Room temperature ranged from 296.25 to
297.85 K with a mean value of 297.25 K. The second set of experiments
measured the headspace concentration of nicotine from binary mixtures
with 1,2-propanediol. A walk-in environmental chamber set to 298.15
K/60% relative humidity was used, and headspace was sampled inside
the environmental chamber. Room temperature was measured at each sampling
time using a Type K thermocouple and ranged from 297.95 to 298.25
K with a mean value of 298.15 K.
