X-Ray fluorescence spectrometer and method of calibrating the sa

Details X-Ray fluorescence spectrometer and method of calibrating the sa X-Ray fluorescence spectrometer and method of calibrating the sa

1982-11-01

1986-03-18

Smith, Alfred E.

X-ray or gamma ray systems or devices

Specific application

Fluorescence

378 44, 378207, G01N 23223

Patent

active

045773386

ABSTRACT:
X-ray fluorescence spectrometer for determining the sulfur content of oil and other matrices, and method of calibrating the same. The spectrometer comprises a pulse height analyzer and a computer for analyzing the energy spectrum of photons emitted by a sample in regions corresponding to the energy levels of photons emitted by sulfur and the target line x-rays scattered by the sample. The windows through which the energy is sampled are adjusted to provide a calibration curve of predetermined shape, and a built-in standard is analyzed and a value corresponding to the ratio of the relative intensities of the fluorescent energy from the standard and the scattered target line x-ray radiation is stored during initial calibration of the system. Thereafter, the system is recalibrated simply by analyzing the build-in standard again, adjusting the sampling windows, and adjusting a constant in the relationship by which the sulfur content is determined to compensate for drift in the system.

REFERENCES:
patent: 3198944 (1965-08-01), Furbee
patent: 4015124 (1977-03-01), Page
patent: 4037099 (1977-07-01), Oda et al.
patent: 4150288 (1979-04-01), Inoue et al.

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