X-Ray fluorescence analysis

Details X-Ray fluorescence analysis X-Ray fluorescence analysis

1979-07-13

1981-08-11

Church, Craig E.

Radiant energy

Coded record and readers; invisible radiant energy type

250273, G01N 2322

Patent

active

042836255

ABSTRACT:
A sample is analyzed for the presence of an element by exposing it to radiation which causes the element to emit a characteristic radiation. Background radiation and the characteristic radiation are passed through a first filter which attenuates the characteristic radiation. The time required for a fixed amount of radiation to pass through the first filter is measured to establish a reference time. Radiation from the sample is then passed through a second filter which attenuates the characteristic radiation by an amount different from the first filter. The amount of radiation passing through the second filter is measured during a time interval substantially equal to the reference time. The difference between the two amounts of radiation indicates the amount of element in the sample and reduces errors due to samples of different composition and physical condition and due to variation of radiation intensity from the source.

REFERENCES:
patent: 3452193 (1969-06-01), Petersen
patent: 3581087 (1971-05-01), Brenkerhoff
patent: 3710104 (1973-01-01), Pavlek
patent: 4016419 (1977-04-01), Kotani

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