Quote Originally Posted by scooterjay
does anyone have a method for filtering frozen urine? it gets cloudy with precipitated sediment after awhile. running some tests now on filtration methods, shelf life of frozen pee, pH, specific gravity (mixing it with distilled water), smell (ammonia smell will tip off the collection person), color, turbidity, etc. etc.

when you put it in the freezer put cellophane over the top, making sure it touches the surface of the urine. If there's no room to precipitate you won't get the cloudiness and what not.