Non-dispersive X-ray fluorescence analyzer

Details Non-dispersive X-ray fluorescence analyzer Non-dispersive X-ray fluorescence analyzer

1975-08-26

1977-04-05

Smith, Alfred E.

Radiant energy

Coded record and readers; invisible radiant energy type

250273, G01N 2500

Patent

active

040164195

ABSTRACT:
A non-dispersive fluorescence x-ray analyzer apparatus and method for measuring the concentration of an element contained in a sample. The apparatus has an x-ray source which directs x-rays against a sample to be analyzed and a reference sample which are both at equal distances from the x-ray source. The fluorescence x-ray spectrum from both the sample to be analyzed and the reference sample is detected and converted into a series of pulse signals. Counters count the signals from both samples, and the counter for counting the pulse signals from the reference sample is set to terminate the operation of the counter for counting the signals from the sample when a pre-determined number of pulses is counted from the reference sample. The number of pulses from the sample to be analyzed is then used for performing a mathematical computation to determine the concentration of the element in the sample being analyzed, which concentration is proportional to the number of pulses counted.

REFERENCES:
patent: 2763784 (1956-09-01), Webster
patent: 2784319 (1957-03-01), Flook et al.
patent: 2890344 (1959-06-01), Behr
patent: 3114832 (1963-12-01), Alvarez
patent: 3859525 (1975-01-01), Ashe

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