ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Phase formation in sodium dodecylsulfate solutions in the presence of salicylic acid for preconcentration purposes

Viktoriia S. Starova and Sergey A. Kulichenko

Analytical Chemistry Department, Faculty of Chemistry, Taras Shevchenko Kyiv University, Volodymyrska Str. 64, Kyiv, 01033, Ukraine

E-mail: Starova_V@univ.kiev.ua

Received: 18 March 2009  Revised: 3 July 2009  Accepted: 13 July 2009

Abstract: The occurrence of surfactant-rich phases in aqueous sodium dodecylsulfate solutions in the presence of salicylic acid was investigated. The effect of acidity, electrolyte and salicylic acid concentrations on the parameters of phase formation were studied. Optimal conditions for microcomponent preconcentration were found. The features of solubilization efficiency changes of organic substances depending on their charge and hydrophobicity were established. High efficacy of preconcentration of strongly hydrophobic, positively charged substrates by low-temperature surfactant-rich phases obtained in the sodium dodecylsulfate-salicylic acid-sodium chloride ternary system is shown.

Keywords: surfactant - sodium dodecylsulfate - salicylic acid - preconcentration

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-009-0086-7

Chemical Papers 64 (1) 98–105 (2010)