Urine
Composition: 95-97% water, 3-5% solids Sample should be delivered and tested in the laboratory within 2 hours As soon as urine is voided, changes occur TOTAL SOLIDS IN 24 HOURS: 60 grams MAJOR ORGANIC SUBS: UREA MAJOR INORGANIC SUBS:Cl- > Na+ > K CHANGES IN UNPRESERVED URINE INCREASED REASON Odor Urea ➡ ammonia due to bacterial …