Colorimetric determination of pH
Abstract
There is a need for a simple, rapid, reliable means for determining pH values of concentrated, high salt solutions without reliance on human eye and ambient light. The method comprises the steps of preparing a set of reference solutions, measuring the light absorption by each reference solution, adding indicator dye to each reference solution, measuring the light absorption by each such reference mixture, comparing the two solutions to determine the dye color at each pH, normalizing the spectra of mixture to the isosbestic point, and matching the color of the pH of the solution to one of the colors of the pHs in the reference solution set. In this way, the pH can be determined to within 0.1 pH unit, a far more precise method than using the human eye.
- Inventors:
- Publication Date:
- Research Org.:
- Westinghouse Savannah River Co., Aiken, SC (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 10147517
- Patent Number(s):
- PATENTS-US-A7681297
- Application Number:
- ON: DE93012027
- Assignee:
- Dept. of Energy
- DOE Contract Number:
- AC09-89SR18035
- Resource Type:
- Patent Application
- Resource Relation:
- Other Information: PBD: 1991
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; PH VALUE; MEASURING METHODS; SOLUTIONS; BRINES; ABSORPTION SPECTROSCOPY; DYES; 400102; CHEMICAL AND SPECTRAL PROCEDURES
Citation Formats
Baumann, E W, and Buchanan, B R. Colorimetric determination of pH. United States: N. p., 1991.
Web.
Baumann, E W, & Buchanan, B R. Colorimetric determination of pH. United States.
Baumann, E W, and Buchanan, B R. 1991.
"Colorimetric determination of pH". United States.
@article{osti_10147517,
title = {Colorimetric determination of pH},
author = {Baumann, E W and Buchanan, B R},
abstractNote = {There is a need for a simple, rapid, reliable means for determining pH values of concentrated, high salt solutions without reliance on human eye and ambient light. The method comprises the steps of preparing a set of reference solutions, measuring the light absorption by each reference solution, adding indicator dye to each reference solution, measuring the light absorption by each such reference mixture, comparing the two solutions to determine the dye color at each pH, normalizing the spectra of mixture to the isosbestic point, and matching the color of the pH of the solution to one of the colors of the pHs in the reference solution set. In this way, the pH can be determined to within 0.1 pH unit, a far more precise method than using the human eye.},
doi = {},
url = {https://www.osti.gov/biblio/10147517},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 31 00:00:00 EST 1991},
month = {Tue Dec 31 00:00:00 EST 1991}
}