title: Determination of copper and iron in human blood serum by energy dispersive x-ray analysis.
abstract: Human blood serum has been analyzed  by X-ray fluorescence spectroscopy utilizing the effect of background reduction by total reflexion of the incident X-ray beam on an optical flat as sample support. For sample preparation a drop of 10 microliter serum was pipetted onto the support and dried to a thin film. The minimum detectable limit was about 1.5 mmol/l in 1000 s and the precision in the 20 mmol/l range of the metals was 3-5%.
mesh_terms: D003300:Copper / Q000097:blood*; D006801:Humans; D007501:Iron / Q000097:blood*; D013050:Spectrometry, Fluorescence / Q000295:instrumentation / Q000379:methods; D014965:X-Rays
chemical_list: D003300:Copper; D007501:Iron