title: Micromethod for determining plasma ammonia nitrogen with use of an ion-selective electrode.
abstract: A micromethod for measuring the ammonia nitrogen content of plasma by use of an ion-selective electrode is evaluated and described. The effect of storing plasma for 24, 48, and 72 h at -70 degrees C was evaluated. Values for newborns and fasting adults were 880 micrograms/L (SD, 210 micrograms/L) and 620 micrograms/L (SD, 170 micrograms/L), respectively.
mesh_terms: D000328:Adult; D000641:Ammonia / Q000097:blood*; D004566:Electrodes; D005215:Fasting; D006801:Humans; D007231:Infant, Newborn; D008832:Microchemistry / Q000379:methods; D009584:Nitrogen / Q000097:blood*; D013048:Specimen Handling; D013997:Time Factors
chemical_list: D000641:Ammonia; D009584:Nitrogen