Sorry I got a little excited about the possible chemistry experiment lol. I think chemistry experiments are fun. Go figure. Anyway, it wouldn't be wasting it if you were careful, but you would definitely loose a few mgs. Coffee filters work well if you don't have access to lab grade filters. A much easier way would to evaporate say .5 ml on a mirror or plate and see what's left. You could then weigh it if you had a scale that measures in mg and see if there was 25 mg of stuff in it. That being said, unless you have a degree in analytical chemistry and access to a lab it will only tell you SOMETHING is in there, not what. I agree that if you are concerned, have it analyzed by a lab. I'd definitely like to see that happen.
Just cause you pour syrup on shit don't make it pancakes.