X-Ray Fluorescence Capabilities for Uranium Ore Analysis

Abstract

A rapid x-ray fluorescence (XRF) method for the quantitative analysis of uranium i n ore and process samples i s demonstrated. The method requires no uranium ore standar.ds and provides a relative precision of 22.5%. Particl e-size and sel f-absorption effects are eval uated a1 ong wi t h current methods of exci t a t i on and detection for M, L, and K series uranium x-rays. Sensitivities and detection 1 imi t s are comparable using either energy dispersive or wavelength dispersive analysis of uranium L x-rays, and wavelength dispersive analysis of uranium M x-rays f o r both thick and t h i n samples. The XRF methods are more sensitive than the analysis of uranium by F52cf neutron-induced y-ray analysis o r by direct photon analysis of urani um daughters.

Subject: Transport and storage of milk and milk products

“…Poor temperature here can alter the consistency and acidity of product. Nielson (1974) has indicated that variation of cooling after incubation can alter the viscosity of yoghurt, and its stability against syneresis. Puchan, Banhegyi & Flueler (1974) have shown that the activity of micro-organisms and consequently the acidity of yoghurt was markedly affected by storage temperatures.…”