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
- Application Number:
- PPN: US 7-957133
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- 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 = {Tue Mar 29 00:00:00 EST 1994},
month = {Tue Mar 29 00:00:00 EST 1994}
}