Potentiometric titration of long chain quaternary ammonium compounds using sodium tetraphenyl borate

1989 ◽  
Vol 66 (12) ◽  
pp. 1831-1833 ◽  
Author(s):  
C. N. Wang ◽  
L. D. Metcalfe ◽  
J. J. Donkerbroek ◽  
A. H. M. Cosijn
Keyword(s):  
Potentiometric Titration ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Compounds ◽  
Sodium Tetraphenyl Borate ◽  
Tetraphenyl Borate ◽  
Ammonium Compounds ◽  
Long Chain

scholarly journals Soft Antimicrobial Agents:  Synthesis and Activity of Labile Environmentally Friendly Long Chain Quaternary Ammonium Compounds

2003 ◽  
Vol 46 (19) ◽  
pp. 4173-4181 ◽  
Author(s):  
Thorsteinn Thorsteinsson ◽  
Már Másson ◽  
Karl G. Kristinsson ◽  
Martha A. Hjálmarsdóttir ◽  
Hilmar Hilmarsson ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Antimicrobial Agents ◽  
Environmentally Friendly ◽  
Quaternary Ammonium Compounds ◽  
Ammonium Compounds ◽  
Long Chain

Titration of long-chain quaternary ammonium compounds using tetraphenylboron

1966 ◽  
Vol 43 (6) ◽  
pp. 355-357 ◽  
Author(s):  
L. D. Metcalfe ◽  
R. J. Martin ◽  
A. A. Schmitz
Keyword(s):  
Quaternary Ammonium ◽  
Quaternary Ammonium Compounds ◽  
Ammonium Compounds ◽  
Long Chain

Loss of bactericidal capacity of long-chain quaternary ammonium compounds with protein at lowered temperature

Apmis ◽  
1999 ◽  
Vol 107 (1-6) ◽  
pp. 606-612 ◽  
Author(s):  
B. AHLSTRÖM ◽  
R. A. THOMPSON ◽  
L. EDEBO
Keyword(s):  
Quaternary Ammonium ◽  
Quaternary Ammonium Compounds ◽  
Bactericidal Capacity ◽  
Ammonium Compounds ◽  
Long Chain

scholarly journals Mixtures of Quaternary Ammonium Compounds and Long-chain Fatty Acids as Antifungal Agents

1961 ◽  
Vol 9 (6) ◽  
pp. 538-541
Author(s):  
F. C. Kull ◽  
P. C. Eisman ◽  
H. D. Sylwestrowicz ◽  
R. L. Mayer
Keyword(s):  
Fatty Acids ◽  
Quaternary Ammonium ◽  
Antifungal Agents ◽  
Quaternary Ammonium Compounds ◽  
Long Chain Fatty Acids ◽  
Ammonium Compounds ◽  
Long Chain ◽  
Chain Fatty Acids

scholarly journals Mixtures of Quaternary Ammonium Compounds and Long-chain Fatty Acids as Antifungal Agents

1961 ◽  
Vol 9 (6) ◽  
pp. 538-541 ◽  
Author(s):  
F. C. Kull ◽  
P. C. Eisman ◽  
H. D. Sylwestrowicz ◽  
R. L. Mayer
Keyword(s):  
Fatty Acids ◽  
Quaternary Ammonium ◽  
Antifungal Agents ◽  
Quaternary Ammonium Compounds ◽  
Long Chain Fatty Acids ◽  
Ammonium Compounds ◽  
Long Chain ◽  
Chain Fatty Acids

scholarly journals Determination of Quaternary Ammonium Compounds by Potentiometric Titration with an Ionic Surfactant Electrode: Single-Laboratory Validation

2010 ◽  
Vol 93 (5) ◽  
pp. 1542-1552 ◽  
Author(s):  
Randi Price ◽  
Ping Wan
Keyword(s):  
Potentiometric Titration ◽  
Quaternary Ammonium ◽  
Reference Electrode ◽  
Quaternary Ammonium Compounds ◽  
Ionic Surfactant ◽  
Lauryl Sulfate ◽  
Quaternary Nitrogen ◽  
Titration Procedure ◽  
Single Laboratory ◽  
Ammonium Compounds

Abstract A potentiometric titration for determining the quaternary ammonium compounds (QAC) commonly found in antimicrobial products was validated by a single laboratory. Traditionally, QACs were determined by using a biphasic (chloroform and water) manual titration procedure. Because of safety considerations regarding chloroform, as well as the subjectivity of color indicator-based manual titration determinations, an automatic potentiometric titration procedure was tested with quaternary nitrogen product formulations. By using the Metrohm Titrando system coupled with an ionic surfactant electrode and an Ag/AgCl reference electrode, titrations were performed with various QAC-containing formulation products/matrixes; a standard sodium lauryl sulfate solution was used as the titrant. Results for the products tested are sufficiently reproducible and accurate for the purpose of regulatory product enforcement. The robustness of the method was measured by varying pH levels, as well as by comparing buffered versus unbuffered titration systems. A quantitation range of 11000 ppm quaternary nitrogen was established. Eight commercially available antimicrobial products covering a variety of matrixes were assayed; the results obtained were comparable to those obtained by the manual titration method. Recoveries of 94 to 104% were obtained for spiked samples.

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