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

Title: Surfactant/detergent titration analysis method and apparatus for machine working fluids, surfactant-containing wastewater and the like

Abstract

The present invention is an improved method and related apparatus for quantitatively analyzing machine working fluids and other aqueous compositions such as wastewater which contain various mixtures of cationic, neutral, and/or anionic surfactants, soluble soaps, and the like. The method utilizes a single-phase, non-aqueous, reactive titration composition containing water insoluble bismuth nitrate dissolved in glycerol for the titration reactant. The chemical reaction of the bismuth ion and glycerol with the surfactant in the test solutions results in formation of micelles, changes in micelle size, and the formation of insoluble bismuth soaps. These soaps are quantified by physical and chemical changes in the aqueous test solution. Both classical potentiometric analysis and turbidity measurements have been used as sensing techniques to determine the quantity of surfactant present in test solutions. This method is amenable to the analysis of various types of new, in-use, dirty or decomposed surfactants and detergents. It is a quick and efficient method utilizing a single-phase reaction without needing a separate extraction from the aqueous solution. It is adaptable to automated control with simple and reliable sensing methods. The method is applicable to a variety of compositions with concentrations from about 1% to about 10% weight. It is alsomore » applicable to the analysis of waste water containing surfactants with appropriate pre-treatments for concentration. 1 fig.« less

Inventors:
;
Publication Date:
Research Org.:
Lockheed Martin Energy Syst Inc
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
570456
Patent Number(s):
US 5,721,143/A/
Application Number:
PAN: 8-823,152
Assignee:
Lockheed Martin Energy Research Corp., Oak Ridge, TN (United States)
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 24 Feb 1998
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; WASTE WATER; WORKING FLUIDS; TITRATION; SURFACTANTS; QUANTITATIVE CHEMICAL ANALYSIS; BISMUTH NITRATES

Citation Formats

Smith, D D, and Hiller, J M. Surfactant/detergent titration analysis method and apparatus for machine working fluids, surfactant-containing wastewater and the like. United States: N. p., 1998. Web.
Smith, D D, & Hiller, J M. Surfactant/detergent titration analysis method and apparatus for machine working fluids, surfactant-containing wastewater and the like. United States.
Smith, D D, and Hiller, J M. Tue . "Surfactant/detergent titration analysis method and apparatus for machine working fluids, surfactant-containing wastewater and the like". United States.
@article{osti_570456,
title = {Surfactant/detergent titration analysis method and apparatus for machine working fluids, surfactant-containing wastewater and the like},
author = {Smith, D D and Hiller, J M},
abstractNote = {The present invention is an improved method and related apparatus for quantitatively analyzing machine working fluids and other aqueous compositions such as wastewater which contain various mixtures of cationic, neutral, and/or anionic surfactants, soluble soaps, and the like. The method utilizes a single-phase, non-aqueous, reactive titration composition containing water insoluble bismuth nitrate dissolved in glycerol for the titration reactant. The chemical reaction of the bismuth ion and glycerol with the surfactant in the test solutions results in formation of micelles, changes in micelle size, and the formation of insoluble bismuth soaps. These soaps are quantified by physical and chemical changes in the aqueous test solution. Both classical potentiometric analysis and turbidity measurements have been used as sensing techniques to determine the quantity of surfactant present in test solutions. This method is amenable to the analysis of various types of new, in-use, dirty or decomposed surfactants and detergents. It is a quick and efficient method utilizing a single-phase reaction without needing a separate extraction from the aqueous solution. It is adaptable to automated control with simple and reliable sensing methods. The method is applicable to a variety of compositions with concentrations from about 1% to about 10% weight. It is also applicable to the analysis of waste water containing surfactants with appropriate pre-treatments for concentration. 1 fig.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {2}
}