Atomic absorption spectrophotometer

Details Atomic absorption spectrophotometer Atomic absorption spectrophotometer

2006-10-31

2006-10-31

Lauchman, Layla G. (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrophotometer

C356S312000, C356S311000, C356S326000

Reexamination Certificate

active

07130044

ABSTRACT:
At the time of measurement of a sample, before a sample is introduced into a graphite tube, signal voltages which would be detected by a photomultiplier in connection with all programmable combinations of atomizing temperatures of a graphite tube, widths of entrance and exit slits provided in a spectrometer, and wavelengths into which the light is to be decomposed by the diffraction grating are stored in memory beforehand. At the time of measurement of a sample, an amplification factor of the photomultiplier is controlled by a negative high-voltage controller according to measurement requirements, or measurement is performed after an optimum detector signal voltage is set by controlling the amplification factor of the detector signal output from an amplifier.

REFERENCES:
patent: 5018856 (1991-05-01), Harnly et al.
patent: 5579104 (1996-11-01), Honda et al.
patent: 5861949 (1999-01-01), Kojima
patent: 6683685 (2004-01-01), Sakai
patent: 06-094606 (1994-04-01), None
patent: 2002-071558 (2002-03-01), None

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