Simultaneous quantitation of seven elements by an x-ray fluorescence system for the microsphere method

Conference · Wed Feb 01 04:00:00 EST 1989 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:6359353

Morita, Y; Kaufman, L; Hosier, K; Payne, B; Hoffman, J I.E.

An automated x-ray fluorescence system with a low Compton background was designed utilizing a metal filter, electronic devices, a polarized x-ray for element excitation, a Si(Li) detector, and a commercially-available x-ray tube. Each of the elements Rb, Mo, Ag, I, La, and Gd was tested in order to select a single optimal filter. A low Compton background and a high count rate over a wide spectral range were obtained with a filter optimized for Ag. Regions of interest were chosen for K..cap alpha.. peaks of Zr, Mo, Rh, Ag, Sn, I, And Ba. the net K..cap alpha.. peak areas were computed by subtracting the K..beta.. counts from the total net counts in the regions of interest. An excellent linear relation was obtained between the computed K..cap alpha.. net counts and their concentrations. The net count rates (cpm/ppm) were 29.34 (Zr) 46.56 (Mo), 69.78 (Rh), 81.60 (Ag), 77.75 (Sn), 70.30 (I), and 74.13 (Ba). All seven elements can be used for nonradioactive microspheres with satisfactory counting statistics for simultaneous measurements of regional blood flows.

• Research Organization: Cardiovascular Research Institute and the Depts. of Pediatrics and Radiology, Univ. of California, San Francisco, CA (US)
• OSTI ID: 6359353
• Report Number(s): CONF-881103-
• Conference Information: Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: 36:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALKALI METALS
ALKALINE EARTH METALS
BARIUM
BLOOD FLOW
ELECTRON TUBES
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
EVALUATION
FILTERS
GADOLINIUM
HALOGENS
IODINE
LANTHANUM
LITHIUM
MEASURING INSTRUMENTS
METALS
MICROSPHERES
MOLYBDENUM
NONMETALS
OPTIMIZATION
RADIATION DETECTORS
RARE EARTHS
RUBIDIUM
SEMIMETALS
SILICON
SILVER
TIN
TRANSITION ELEMENTS
X-RAY EQUIPMENT
X-RAY FLUORESCENCE ANALYZERS
X-RAY TUBES
ZIRCONIUM