Preservation of saliva for ammonia determination.
D000641:Ammonia / Q000032:analysis*; D002725:Chloroform; D003080:Cold Temperature; D004355:Drug Stability; D005615:Freezing; D006801:Humans; D006863:Hydrogen-Ion Concentration; D011309:Preservation, Biological / Q000379:methods*; D012463:Saliva / Q000032:analysis*
D000641:Ammonia; D002725:Chloroform