Apparatus for emission spectrochemical analysis

Details Apparatus for emission spectrochemical analysis Apparatus for emission spectrochemical analysis

1990-02-23

1993-06-01

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

356318, G01J 330, G01N 2163, G01N 2167

Patent

active

052164829

ABSTRACT:
Apparatus for emission spectrochemical analysis of a sample containing elements to be analyzed, wherein the sample is cyclically excited with relatively high energy to vaporize the sample elements and successively with relatively low energy to cause the vaporized elements to emit light containing spectral lines characteristic of the elements, which spectral lines are detected by a plurality of photomultiplier tubes corresponding to the spectral lines, with a common negative high-voltage source connected to the dynodes of the photomultiplier tubes. The negative high-voltage source is controlled in such a manner that it supplies a negative high voltage to the dynodes of the photomultiplier tubes to activate the tubes only during the low-energy excitation of the sample.

REFERENCES:
patent: 3531202 (1970-09-01), Wilkinson et al.
patent: 4393327 (1983-07-01), Walters et al.
patent: 4898466 (1990-02-01), Fukui et al.
Bhaumik et al, "Stroboscopic Time-Resolved Spectroscopy", The Review of Scientific Instruments, vol. 36, #1, Jan. 1965, pp. 37-40.
Anon, "New Laser Microspectral Analyzer", Monthly Technical Review, vol. 20, #1, pp. 8-9, Jan. 1986.
Technical Digest, No. 35, Jul. 1974, Western Electric; T. H. Briggs et al.: "Direct Reading Laser Spectrometer", pp. 9-10.

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