Effect of the Compositions of Sample and Polymer Sorbents on the Extraction of Volatile Compounds by Solid-Phase Microextraction


Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription Access

Abstract

A comparative study was performed by solid phase microextraction and capillary gas chromatography to establish the ability of four polymer sorbents of different compositions to extract and concentrate volatile organic compounds from the gas phase above an aqueous solution. All polymer sorbents sorbed nonpolar monoterpene hydrocarbons via a cooperative mechanism with almost equal and high efficiency. Sorbents based on polymethyl disiloxane and its mixture with divinylbenzene were more effective in extracting acetates and sesquiterpenes. As the concentration of these compounds in the gas phase increased, their binding by sorbents decreased. It was found that the determination of polar compounds depended on the presence of a solvent in the system. Compounds that are highly soluble in water (alcohols, ketones, etc.) had low coefficients of distribution between gas and water phases. Consequently, their sorption to any of the polymer sorbents was negligible. In the absence of the solvent, the degree of their extraction from the gas phase above the sample was high. It was shown that the actual composition of compounds in the initial mixture of essential oils could significantly differ from their composition in the gas phase. This method is convenient and informative for the purpose of studying the composition of volatile compounds in the gas phase that determine the flavor of the product.

About the authors

T. A. Misharina

Emanuel Institute of Biochemical Physics; Plekhanov Russian University of Economics

Author for correspondence.
Email: tmish@rambler.ru
Russian Federation, Moscow, 119334; Moscow, 117997

M. B. Terenina

Emanuel Institute of Biochemical Physics

Email: tmish@rambler.ru
Russian Federation, Moscow, 119334

N. I. Krikunova

Emanuel Institute of Biochemical Physics

Email: tmish@rambler.ru
Russian Federation, Moscow, 119334

I. A. Mihailov

Plekhanov Russian University of Economics

Email: tmish@rambler.ru
Russian Federation, Moscow, 117997

Supplementary files

Supplementary Files
Action
1. JATS XML

Copyright (c) 2018 Pleiades Publishing, Inc.