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Licensed Unlicensed Requires Authentication Published by De Gruyter May 18, 2013

Two-Phase Titration Method for Cationic Surface Active Agents Determination with Use of 5-(3-Bromo-4-hydroxy-5-methoxyphenyl)-7,7-dimethyl-7H-indolo[1,2-a]quinolinium Perchlorate Dye

Zweiphasentitration zur Bestimmung von kationischen Tensiden mit dem Farbstoff 5-(3-Bromo-4-hydroxy-5-methoxyphenyl)-7,7-dimethyl-7H-indolo[1,2-a]quinoliniumperchlorat
M. Gąsiorowska and E. K. Wróblewska

Abstract

The direct two-phase titration method with use of solvatochromic dye, i. e. 5-(3-bromo-4-hydroxy-5-methoxyphenyl)-7,7-dimethyl-7H-indolo[1,2-a]quinolinium perchlorate (1) for cationic surfactants determination is presented which is the modification of an earlier described procedure for anionic surface active substances detection. The method was tested on standard solution of benzethonium chloride (cationic detergent) which enables to estimate its accuracy as well as on few commercially available products to verify its utility. The influence of pH value of the probe on the titration endpoint determination was discussed and a simple solution of this problem has been proposed.

Kurzfassung

Die direkte Zweiphasentitration zur Bestimmung von kationischen Tensiden unter Einsatz des solvatochromen Farbstoffs 5-(3-Bromo-4-hydroxy-5-methoxyphenyl)-7,7-dimethyl-7H-indolo [1,2-a]quinoliniumperchlorat (1) wird präsentiert. Es handelt sich um eine Modifikation der schon früher für die Bestimmung anionischer Tenside beschriebenen Methode. Die Genauigkeit der Methode wurde mit Standardlösungen aus Benzethoniumchlorid (einem kationischen Tensid) getestet. An kommerziell erhältlichen Produkten wurde die Anwendbarkeit der Methode geprüft. Der Einfluss des pH-Werts der Probe auf den Titrationsendpunkt wurde diskutiert und eine einfache Lösung des Problems wurde vorgeschlagen.


Correspondence to Dr. Monika Gąsiorowska, Department of Instrumental Analysis, Institute of Chemistry and Environmental Protection, West Pomeranian University of Technology, Szczecin, Av. Piastów 42, 71-065 Szczecin, Poland, E-Mail:

Dr. Eng. Monika Gąsiorowska was born in January 1975. She completed her Post Graduation in 1999, and her Ph. D. in 2005 at Technological University of Szczecin. At present she works as Assistant Professor at West Pomeranian University of Technology, Szczecin, Faculty of Chemical Technology and Engineering, Department of Instrumental Analysis as well as Head of Laboratory of General Chemistry.

Dr. Eng. Elwira Katarzyna Wróblewska was born in May 1972. She completed her Post Graduation in 1998, and her Ph. D. in 2002 at Technological University of Szczecin. At present she works as Assistant Professor at West Pomeranian University of Technology, Szczecin, Faculty of Chemical Technology and Engineering, Department of Instrumental Analysis.


References

1. Wang, L. K.: J. Am. Oil Chem. Soc.42 (1975) 339.10.1007/BF02639191Search in Google Scholar PubMed

2. Rosen, M. J.,Hao, F. Z. andMurphy, D. S.: J. Am. Oil Chem. Soc.64 (1987) 439.10.1007/BF02549309Search in Google Scholar

3. Cross, J. T.: Analyst90 (1965) 107131510.1039/an9659000315Search in Google Scholar

4. Motonizu, S. andGao, Y.: Analyst119 (1994) 475.Search in Google Scholar

5. WróblewskaE. K.,Gąsiorowska, M. andSoroka, J. A.: Tenside Surf. Det.47 (2010) 2119Search in Google Scholar

6. Wróblewska, E. K. andGąsiorowska, M.: Tenside Surf. Det.48 (2011) 2127Search in Google Scholar

7. International Standard, ISO 2271:1989 Surface active agents 1989.Search in Google Scholar

8. Soroka, K. B. andSoroka, J. A.: Chemica Scripta29 (1989) 167.Search in Google Scholar

9. Soroka, K. B. andSoroka, J. A.: Polish Patent No 12 12 26 (1979).Search in Google Scholar

10. Soroka, K. B. andSoroka, J. A.: Polish Patent No 12 23 16 (1979).Search in Google Scholar

11. Soroka, K. B.,SorokaJ.A. andGwiazdowski, L.: Polish Patent No13 95 95 (1983).Search in Google Scholar

Received: 2011-07-28
Published Online: 2013-05-18
Published in Print: 2012-01-01

© 2012, Carl Hanser Verlag, München