X-ray spectroscopy in biology and medicine. IV. A simple, indirect sensitive procedure for the determination of nitrogen (ammonia) at the microgram and submicrogram level.
D000641:Ammonia; D008832:Microchemistry; D009584:Nitrogen / Q000737:chemistry*; D013057:Spectrum Analysis; D014965:X-Rays
D000641:Ammonia; D009584:Nitrogen
MICROCHEMISTRY; NITROGEN/chemistry; SPECTRUM ANALYSIS