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Concentrate under reduced pressure?

This may come across as a stupid question, but I was wondering how to 'concentrate under reduced pressure' (as quoted in a journal I am following)? I am currently trying to purify a toxin extracted from a ribbon worm sample. As well as doing various things such as using an ultrasonicator on the sample once added to 5ml of 0.1% acetic acid, as well as boiling and centrifuging it, the journal then says that 'the supernatant was concentrated under reduced pressure and loaded on to a C18 Sep-Pak Cartridge'. This unbound portion was then collected and concentrated to dryness. I did some quick research and found that I would have to use something called a rotary evaporator (or a rotavap).I looked this up on Wikipedia, and found this snippet: "A rotary evaporator (or rotavap) is a device used in chemical laboratories for the efficient and gentle removal of solvents from samples by evaporation. When referenced in the chemistry research literature, description of the use of this technique and equipment may include the phrase "rotary evaporator", though use is often rather signaled by other language (e.g., "the sample was evaporated under reduced pressure")". I was wondering whether 'evaporating under reduced pressure' is the same as 'concentrating under reduced pressure', and if so, will I still be able to use a rotary evaporator? Any help would be much appreciated - thanks beforehand!

Public Comments

Yes. A rotovap concentrates under reduced pressure provided that the compound you are trying to concentrate isn't volatile. Toxins generally aren't.