X-ray spectroscopy in biology and medicine. VI. Use of an ultra-soft x-ray source for the nondestructive detection of microgram amounts of sodium and magnesium.
D001769:Blood; D006801:Humans; D066298:In Vitro Techniques; D008099:Liver; D008274:Magnesium; D008832:Microchemistry; D012964:Sodium; D013057:Spectrum Analysis
D012964:Sodium; D008274:Magnesium