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Title: Apparatus and method for the spectrochemical analysis of liquids using the laser spark

Abstract

A method and apparatus are disclosed for the qualitative and quantitative spectroscopic investigation of elements present in a liquid sample using the laser spark. A series of temporally closely spaced spark pairs is induced in the liquid sample utilizing pulsed electromagnetic radiation from a pair of lasers. The light pulses are not significantly absorbed by the sample so that the sparks occur inside of the liquid. The emitted light from the breakdown events is spectrally and temporally resolved, and the time period between the two laser pulses in each spark pair is adjusted to maximize the signal-to-noise ratio of the emitted signals. In comparison with the single pulse technique, a substantial reduction in the limits of detectability for many elements has been demonstrated. Narrowing of spectral features results in improved discrimination against interfering species.

Inventors:
; ;
Issue Date:
OSTI Identifier:
6188092
Application Number:
ON: TI85005749
Assignee:
Dept. of Energy EDB-85-032271
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; EMISSION SPECTROSCOPY; LASER SPECTROSCOPY; LIQUIDS; ELECTRIC SPARKS; LASER RADIATION; PULSES; ELECTRIC DISCHARGES; ELECTROMAGNETIC RADIATION; FLUIDS; RADIATIONS; SPECTROSCOPY; 400104* - Spectral Procedures- (-1987)

Citation Formats

Cremers, D.A., Radziemski, L.J., and Loree, T.R. Apparatus and method for the spectrochemical analysis of liquids using the laser spark. United States: N. p., 1984. Web.
Cremers, D.A., Radziemski, L.J., & Loree, T.R. Apparatus and method for the spectrochemical analysis of liquids using the laser spark. United States.
Cremers, D.A., Radziemski, L.J., and Loree, T.R. Tue . "Apparatus and method for the spectrochemical analysis of liquids using the laser spark". United States.
@article{osti_6188092,
title = {Apparatus and method for the spectrochemical analysis of liquids using the laser spark},
author = {Cremers, D.A. and Radziemski, L.J. and Loree, T.R.},
abstractNote = {A method and apparatus are disclosed for the qualitative and quantitative spectroscopic investigation of elements present in a liquid sample using the laser spark. A series of temporally closely spaced spark pairs is induced in the liquid sample utilizing pulsed electromagnetic radiation from a pair of lasers. The light pulses are not significantly absorbed by the sample so that the sparks occur inside of the liquid. The emitted light from the breakdown events is spectrally and temporally resolved, and the time period between the two laser pulses in each spark pair is adjusted to maximize the signal-to-noise ratio of the emitted signals. In comparison with the single pulse technique, a substantial reduction in the limits of detectability for many elements has been demonstrated. Narrowing of spectral features results in improved discrimination against interfering species.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {5}
}