Self-referencing spectrophotometric measurements
Abstract
A method 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.
- Inventors:
-
- Martinez, GA
- Aiken, SC
- Issue Date:
- Research Org.:
- E I DUPONT DE NEMOURS & CO INC
- OSTI Identifier:
- 869214
- Patent Number(s):
- 5298428
- Assignee:
- United States Department of Energy (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- DOE Contract Number:
- AC09-76SR00001
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- self-referencing; spectrophotometric; measurements; method; measuring; concentration; chemical; substance; spectrophotometry; comprising; steps; placing; sample; photoreactive; light; source; spectrophotometer; obtaining; absorption; spectrum; fixed; amount; interval; comparing; determine; difference; spectra; mixture; dye; properties; unique; alternatively; optically; transparent; substrate; absorb; transparent substrate; spectrophotometric measurements; optically transparent; light source; absorption spectrum; chemical substance; parent substrate; active substance; /436/356/422/
Citation Formats
O'Rourke, Patrick E, and Van Hare, David R. Self-referencing spectrophotometric measurements. United States: N. p., 1994.
Web.
O'Rourke, Patrick E, & Van Hare, David R. Self-referencing spectrophotometric measurements. United States.
O'Rourke, Patrick E, and Van Hare, David R. Sat .
"Self-referencing spectrophotometric measurements". United States. https://www.osti.gov/servlets/purl/869214.
@article{osti_869214,
title = {Self-referencing spectrophotometric measurements},
author = {O'Rourke, Patrick E and Van Hare, David R},
abstractNote = {A method 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1994},
month = {Sat Jan 01 00:00:00 EST 1994}
}