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Portable X‐ray fluorescence analyser with increased precision by using the method of balanced filters
Author(s) -
Vatai E.,
Andó L.
Publication year - 1986
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300150107
Subject(s) - analyser , ionization , materials science , analytical chemistry (journal) , range (aeronautics) , accuracy and precision , tube (container) , excitation , x ray , optics , atomic physics , chemistry , physics , chromatography , ion , organic chemistry , quantum mechanics , composite material
An increase of an order of magnitude in the precision of the balanced filters method is achieved by using a low‐power x‐ray tube and measuring the ionization current, without increasing the measurement time. A simultaneous change of excitation and detection is essential: the measurement of the ionization current makes possible a dead‐time free detection of the high intensities excited by the x‐ray tube, and leads to a decrease in the statistical error. The standard deviations obtained with a portable analyser utilizing this method in the determination of the Cr and Mn contents of low‐alloy steels in the concentration range 0–1.5% are 0.02 and 0.03%, respectively.