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Title: Method for determining the concentration of atomic species in gases and solids

Abstract

Method for determining the concentration of atomic species in gases and solids. Measurement of at least two emission intensities from a species in a sample that is excited by incident laser radiation. Which generates a plasma therein after a sufficient time period has elapsed and during a second time period, permits an instantaneous temperature to be established within the sample. The concentration of the atomic species to be determined is then derived from the known emission intensity of a predetermined concentration of that species in the sample at the measured temperature, a quantity which is measured prior to the determination of the unknown concentration, and the actual measured emission from the unknown species, or by this latter emission and the emission intensity of a species having known concentration within the sample such as nitrogen for gaseous air samples.

Inventors:
 [1]
  1. 304 Cheryl Ave., Los Alamos, NM 87544
Issue Date:
Research Org.:
Laser Diagnostics, Los Alamos, NM (United States)
OSTI Identifier:
871356
Patent Number(s):
5715053
Assignee:
Loge, Gary W. (304 Cheryl Ave., Los Alamos, NM 87544)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
FG02-94ER81671
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; determining; concentration; atomic; species; gases; solids; measurement; emission; intensities; sample; excited; incident; laser; radiation; generates; plasma; therein; sufficient; time; period; elapsed; permits; instantaneous; temperature; established; determined; derived; intensity; predetermined; measured; quantity; prior; determination; latter; nitrogen; gaseous; air; samples; measured temperature; atomic species; incident laser; time period; laser radiation; sufficient time; air sample; emission intensity; predetermined concentration; emission intensities; /356/

Citation Formats

Loge, Gary W. Method for determining the concentration of atomic species in gases and solids. United States: N. p., 1998. Web.
Loge, Gary W. Method for determining the concentration of atomic species in gases and solids. United States.
Loge, Gary W. Thu . "Method for determining the concentration of atomic species in gases and solids". United States. https://www.osti.gov/servlets/purl/871356.
@article{osti_871356,
title = {Method for determining the concentration of atomic species in gases and solids},
author = {Loge, Gary W},
abstractNote = {Method for determining the concentration of atomic species in gases and solids. Measurement of at least two emission intensities from a species in a sample that is excited by incident laser radiation. Which generates a plasma therein after a sufficient time period has elapsed and during a second time period, permits an instantaneous temperature to be established within the sample. The concentration of the atomic species to be determined is then derived from the known emission intensity of a predetermined concentration of that species in the sample at the measured temperature, a quantity which is measured prior to the determination of the unknown concentration, and the actual measured emission from the unknown species, or by this latter emission and the emission intensity of a species having known concentration within the sample such as nitrogen for gaseous air samples.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

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Works referenced in this record:

Electron number density and temperature measurement in a laser-induced hydrogen plasma
journal, March 1995


Detection of cadmium, lead and zinc in aerosols by laser-induced breakdown spectrometry
journal, January 1988


Determination of Uranium in Solution Using Laser-Induced Breakdown Spectroscopy
journal, August 1987