I just recently came across a very interesting report.
A friend of mine showed it to me. It was link to a previously aired report on a german channel.
Unfortunately i can't remember the link, but it was shocking...
There was a BA Cpt and a british FA intervied... SHOCKING!!!!! These two couldn't control their body... they where shaking.
The team took samples on many different airplanes and had them analyzed...
The most poluted ac was a Condor 757-300 followed by a BAE 146 ..
It was put down to a specific engine OIL and of course leaky engine seals...
Maybe someone can help with a link...
Wonder if the Tristar L1011-500 was in that test! With 3 packs, it was supposed to recycle 100% of the A/C air
EVERY 3 MINUTES !!! 
Now, that was a plane... Or am I getting too old for this?
