skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Self-referencing spectrophotometric measurements

Abstract

A method is described for measuring the concentration of a chemical substance by spectrophotometry comprising the steps of placing a sample of a photoreactive substance between the light source and a spectrophotometer, obtaining an absorption spectrum of the substance using a fixed amount of light from the light source, obtaining a second absorption spectrum after a short interval, comparing the two to determine the concentration of the chemical substance from the difference in the spectra. If the chemical substance is not photoreactive, a photoreactive mixture can be made with a photoreactive dye that has photoreactive properties unique to the mixture. Alternatively, an optically transparent substrate can absorb the substance or the dye/substance mixture. 3 figures.

Inventors:
;
Issue Date:
OSTI Identifier:
5110956
Patent Number(s):
5298428 A
Application Number:
PPN: US 7-957133
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; EDB-94-076295
DOE Contract Number:  
AC09-76SR00001
Resource Type:
Patent
Resource Relation:
Patent File Date: 7 Oct 1992
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; MATERIALS; SPECTROPHOTOMETRY; ABSORPTION SPECTRA; PHOTOSENSITIVITY; QUANTITATIVE CHEMICAL ANALYSIS; SAMPLE PREPARATION; CHEMICAL ANALYSIS; SENSITIVITY; SPECTRA; 400102* - Chemical & Spectral Procedures

Citation Formats

O'Rourke, P.E., and Van Hare, D.R. Self-referencing spectrophotometric measurements. United States: N. p., 1994. Web.
O'Rourke, P.E., & Van Hare, D.R. Self-referencing spectrophotometric measurements. United States.
O'Rourke, P.E., and Van Hare, D.R. Tue . "Self-referencing spectrophotometric measurements". United States.
@article{osti_5110956,
title = {Self-referencing spectrophotometric measurements},
author = {O'Rourke, P.E. and Van Hare, D.R.},
abstractNote = {A method is described for measuring the concentration of a chemical substance by spectrophotometry comprising the steps of placing a sample of a photoreactive substance between the light source and a spectrophotometer, obtaining an absorption spectrum of the substance using a fixed amount of light from the light source, obtaining a second absorption spectrum after a short interval, comparing the two to determine the concentration of the chemical substance from the difference in the spectra. If the chemical substance is not photoreactive, a photoreactive mixture can be made with a photoreactive dye that has photoreactive properties unique to the mixture. Alternatively, an optically transparent substrate can absorb the substance or the dye/substance mixture. 3 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {3}
}