Just find a nice syringe with a 16 gauge (or whatever) needle tip, slip some of this stuff (the teflon microtube) over your needle tip, disconnect your vacuum hose and slide the (other end of the teflon micro-) tube in through your vacuum adaptor and into your recieving flask, to extract (by drawing back the plunger on the syringe) your goodies (or baddies).
What part of that is hard to understand?