Apparatus and methods for optical emission spectroscopy

Details Apparatus and methods for optical emission spectroscopy Apparatus and methods for optical emission spectroscopy

1990-04-23

1994-02-08

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

G01J 330, G01N 2167

Patent

active

052852512

ABSTRACT:
A spark generator suitable for use in an optical emission spectrometer, and capable of generating a spark in a spark gap formed between an electrode and a sample to be analyzed, comprises a generator for generating a current of programmable amplitude in the spark gap in each of a series of discrete time intervals. The spark generator according to the invention is advantageous when compared with conventional spark generators in that it enables a higher degree of choice and control in the form of the spark. In particular, it enables the amplitudes of various portions of the spark to be independently varied, thus permitting the shape of the spark to be tailored to the particular analysis being performed. Also described are methods of optical emission spectroscopy which make use of the advantageous properties of the spark generator.

REFERENCES:
patent: 1971215 (1934-08-01), Feussner
patent: 3308339 (1967-03-01), Berneron
patent: 3396303 (1968-08-01), Gordon
patent: 3729259 (1973-04-01), Cooper et al.
patent: 4055783 (1977-10-01), Walters et al.
patent: 4824249 (1990-04-01), Lucas et al.

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