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Multiple solid-phase microextraction in a non-equilibrium situation: Application in quantitative analysis of chlorophenols and chloroanisoles related to cork taint in wine by Almudena Martínez-Uruñuela; José María González-Sáiz; Consuelo Pizarro is a Chemistry article available to read on EtoBox.

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Multiple HS-solid-phase microextraction (MHS-SPME) is a modification of SPME developed for quantitative analysis that avoids possible matrix effects based on an exhaustive analyte extraction from the sample. In this paper, the theory of this process associated with a nonequilibrium situation has been presented. The application of an optimised HS-SPME-based method in the analysis of chloroanisoles and chlorophenols, previously acetylated, associated with the occurrence of cork taint in different red, white and rosé wine samples, has revealed the existence of matrix effects. This fact determines the choice of standard addition as the adequate technique for the quantification of these compounds in real samples. MHS-SPME is proposed as a good alternative technique with respect to HS-SPME because it avoids matrix effects, simplifies the quantification of these compounds in real samples and reduces analysis time, providing sensitivity below chloroanisole sensory threshold with acceptable precision.

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Author

Almudena Martínez-Uruñuela; José María González-Sáiz; Consuelo Pizarro

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-3778)

Published

2005

Language

EN

Field

Chemistry (Physical Sciences)