Relax, CO2 is considerably heavier than air. Assuming a moderate head space the small amount of air that may have been pulled in should be riding on a cloud of CO2 and not on your beer. If fermentation continues to off gas CO2 the oxygenated air will be pushed out 1st. Otherwise, keep everything still during racking to the bottling bucket and the air will never see your beer (I displace air in my bottling bucket with dry ice before racking).
I make certain to use starsan in my airlocks just in case it were to be sucked in I can be certain it's not filthy water. I'd not be able to use vodka for this purpose because I tend to drink that. Starsan, not so much.
Bottled/Drinking - Dirty Blonde Cutthroat
Bottled/Conditioning - Cupid's Black Heart Baltic Porter