Yes (as in the air sample is irrelevant)- the important part in adding any pre-mixed liquid reagent is that you add the designated liquid volume - any syringe, pipette, or metering system that uses a plunger will have an air pocket in-between the rubber stop and whatever tip would (in a lab setting) receive the dispensing needle.
What you want to look for is the meniscus of the fluid you're drawing - ignore the air, the bottom of the plunger or whatever pretty marks the manufacturer has placed on the plunger arm. The meniscus is the very top of the fluid you're drawing in - it tends to look like a little glass line on top (even curves downwards, sometimes) due to surface tension and a bit of refraction.
To be precise, the syringe is cal'd (ok, marked) such that the scale is correct when reading from the bottom of the meniscus to the bottom of the syringe tip. Note that if you use an extension tube, needle or pipette tip, this scale is no longer accurate.
Bulb-type pipettes (the plunger is in this case your fingers), even the cheap injection-molded ones usually have a scribe on the side to designate 1 ml, for example. When holding it upright, the air rises into the bulb, leaving the bottom part liquid only - it has the same result. The pricey ones (my favorite is Eppendorf) just draw up a certain volume between button pushes; you add a secial pipette tip that holds and dispenses you sample - keeps cross-contamination at a minimum.
Therefore, draw as much air as you want - as long as you're not injecting it into your arm, or your reactor sample, the reagent won't care. Any air dispensed into the sample will probably just bubble up, break the surface and dissipate, anyway (not true for the arm injection, though!)
Cheers,
Ted.
