1. The choice of carrier gas ( mobile phase ) is important. 2. The ablated particles are collected and incorporated into a carrier gas . 3. Therefore, helium is the most common carrier gas used. 4. This can be problematic if the carrier gas is pyrophoric or toxic. 5. Sample is carried through the apparatus by nitrogen carrier gas . 6. Because of the design, the carrier gas can permeate the liquid source. 7. The droplets are then transported by a carrier gas to a furnace where they are heated. 8. Some thermal desorption systems recycle the carrier gas , thereby further reducing the volume of gaseous emissions. 9. The porous membranes cannot prevent the penetration of microdroplets across the hollow fiber into the carrier gas . 10. Ozone is delivered ( sparged ) as a gas in either a dry air or oxygen carrier gas .
