Trapping device consisted of a 150 ml gas washing bottle with sparger (see photo below). A
magnetic stirring bar was added to the gas washing bottle along with 50 ml of extraction solution.
Extraction solution was prepared by mixing 100 ml of acetonitrile, 11.5 g of phosphoric acid, and
800 ml of water. A draeger 100 cc hand pump was connected to the outlet of the gas washing bottle.
The e-cigarette device with the selected cartridge type was connected to the inlet to the gas washing
bottle via tygon tubing. The e-cigarette was butted directly up to the glass to avoid absorption. The
magnet stirrer was turned on. At one minute intervals 100 cc of air were drawn through the ecigarette
into the gas washing bottle. The e-cigarette was observed to assure the LED lit indicating
that the flow rate was sufficient to activate the heater in the e-cigarette. After an appropriate number
of 100 cc puffs were trapped in the gas washing solution, the sample was allowed to mix for 10
minutes and the glass tubing in the gas washing bottle was rinsed with the trapping solution back
into the gas washing bottle. The solution was mixed again and then sampled for analysis.