Stir Bar Sorptive Extraction (SBSE) is a solventless sample preparation technique first proposed by Sandra’s group [1] to extract organic analytes from aqueous samples and then successfully applied to headspace sampling by Tienpont et al. [2] and Bicchi et al. [3], called Headspace Sorptive Extraction (HSSE). SBSE and HSSE are based on the sorption of the analytes onto a thick film of polydimethylsiloxane (PDMS) coated on the glass-coated magnet of a stir bar; PDMS stir bars are marketed under the name Twister® (Gerstel, Mülheim a/d Ruhr, Germany). Both SBSE and HSSE have been shown to be very effective in recovering trace components from liquid samples and vapour phase. [3]. The major limit of sorptive extraction is that PDMS (i.e. an apolar phase) is not highly effective to recover polar analytes (i.e. with low Ko/w), making difficult their analysis in complex matrices. New concentration materials are therefore necessary to extend the range of applications of sorptive extraction. A new generation of twisters coated with polyethyleneglycol-modified silicone (PEG) and polyacrylate/polyethyleneglycol (PA) has recently been introduced and successfully applied to whisky, wine and multivitamin juice SBSE sampling [4]. In this study, PEG and PA twisters have been applied to SBSE and HSSE sampling of a number of matrices in the plant, food and cosmetic fields. Unlike PA, PEG twisters showed good performances (i.e. concentration capability) for all matrices vs. PDMS twisters taken as reference.
POLYETHYLENEGLYCOL-MODIFIED-SILICONE AND POLYACRYLATE TWISTERS FOR STIR BAR SORPTIVE EXTRACTION AND HEADSPACE SORPTIVE EXTRACTION OF VEGETABLE MATRICES IN THE FOOD AND COSMETIC FIELDS
RUOSI, MANUELA ROSANNA;BICCHI, Carlo;CAGLIERO, Cecilia Lucia;GRIGLIONE, Alessandra;LIBERTO, Erica;RUBIOLO, Patrizia;SGORBINI, Barbara
2012-01-01
Abstract
Stir Bar Sorptive Extraction (SBSE) is a solventless sample preparation technique first proposed by Sandra’s group [1] to extract organic analytes from aqueous samples and then successfully applied to headspace sampling by Tienpont et al. [2] and Bicchi et al. [3], called Headspace Sorptive Extraction (HSSE). SBSE and HSSE are based on the sorption of the analytes onto a thick film of polydimethylsiloxane (PDMS) coated on the glass-coated magnet of a stir bar; PDMS stir bars are marketed under the name Twister® (Gerstel, Mülheim a/d Ruhr, Germany). Both SBSE and HSSE have been shown to be very effective in recovering trace components from liquid samples and vapour phase. [3]. The major limit of sorptive extraction is that PDMS (i.e. an apolar phase) is not highly effective to recover polar analytes (i.e. with low Ko/w), making difficult their analysis in complex matrices. New concentration materials are therefore necessary to extend the range of applications of sorptive extraction. A new generation of twisters coated with polyethyleneglycol-modified silicone (PEG) and polyacrylate/polyethyleneglycol (PA) has recently been introduced and successfully applied to whisky, wine and multivitamin juice SBSE sampling [4]. In this study, PEG and PA twisters have been applied to SBSE and HSSE sampling of a number of matrices in the plant, food and cosmetic fields. Unlike PA, PEG twisters showed good performances (i.e. concentration capability) for all matrices vs. PDMS twisters taken as reference.
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