Details
| Original language | English |
|---|---|
| Pages (from-to) | 108-114 |
| Number of pages | 7 |
| Journal | Flavour and fragrance journal |
| Volume | 15 |
| Issue number | 2 |
| Publication status | Published - 18 May 2000 |
Abstract
Thermodynamically and kinetically controlled adsorption capacities of derivatized polystyrenes were compared to a commercial polystyrene resin (Amberlite® XAD 16), a strong acid, cationic exchanger (Amberlite® 200), and a silica gel (Silikagel 100) using the binary model systems (-)-limonene/(-)-carvone and (-)-α-pinene/(-)-borneol. Functionalization with -SCH3, -Br, -B(OH)2, -NO2, or -SO3Na decreased the overall adsorption capacity. Preferred adsorption of (-)-carvone to (-)-limonene was achieved with the sulphonated resin in the aqueous phase. Salting-out experiments showed that the inevitable competition of water molecules dominated, and that (-)-limonene adsorption remained to be kinetically favoured. In n-hexane, however, both (-)-carvone and (-)-borneol were preferentially adsorbed, with loadings 10 times higher than in water with 300 g/l NaCl added. (-)-Borneol loads on Amberlite 200 were only one quarter of the sulphonated XAD 16, and Silikagel 100 was not suitable for multiple adsorption/desorption cycles. Copyright (C) 2000 John Wiley and Sons, Ltd.
Keywords
- Adsorption, Flavour compounds, Reversed-phase polystyrene, Selectivity, Separation technique
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Food Science
- Chemistry(all)
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In: Flavour and fragrance journal, Vol. 15, No. 2, 18.05.2000, p. 108-114.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Selective recovery of volatile flavour compounds using reversed-phase polystyrene adsorbents
AU - Gehrke, Maik
AU - Krings, Ulrich
AU - Berger, Ralf G.
PY - 2000/5/18
Y1 - 2000/5/18
N2 - Thermodynamically and kinetically controlled adsorption capacities of derivatized polystyrenes were compared to a commercial polystyrene resin (Amberlite® XAD 16), a strong acid, cationic exchanger (Amberlite® 200), and a silica gel (Silikagel 100) using the binary model systems (-)-limonene/(-)-carvone and (-)-α-pinene/(-)-borneol. Functionalization with -SCH3, -Br, -B(OH)2, -NO2, or -SO3Na decreased the overall adsorption capacity. Preferred adsorption of (-)-carvone to (-)-limonene was achieved with the sulphonated resin in the aqueous phase. Salting-out experiments showed that the inevitable competition of water molecules dominated, and that (-)-limonene adsorption remained to be kinetically favoured. In n-hexane, however, both (-)-carvone and (-)-borneol were preferentially adsorbed, with loadings 10 times higher than in water with 300 g/l NaCl added. (-)-Borneol loads on Amberlite 200 were only one quarter of the sulphonated XAD 16, and Silikagel 100 was not suitable for multiple adsorption/desorption cycles. Copyright (C) 2000 John Wiley and Sons, Ltd.
AB - Thermodynamically and kinetically controlled adsorption capacities of derivatized polystyrenes were compared to a commercial polystyrene resin (Amberlite® XAD 16), a strong acid, cationic exchanger (Amberlite® 200), and a silica gel (Silikagel 100) using the binary model systems (-)-limonene/(-)-carvone and (-)-α-pinene/(-)-borneol. Functionalization with -SCH3, -Br, -B(OH)2, -NO2, or -SO3Na decreased the overall adsorption capacity. Preferred adsorption of (-)-carvone to (-)-limonene was achieved with the sulphonated resin in the aqueous phase. Salting-out experiments showed that the inevitable competition of water molecules dominated, and that (-)-limonene adsorption remained to be kinetically favoured. In n-hexane, however, both (-)-carvone and (-)-borneol were preferentially adsorbed, with loadings 10 times higher than in water with 300 g/l NaCl added. (-)-Borneol loads on Amberlite 200 were only one quarter of the sulphonated XAD 16, and Silikagel 100 was not suitable for multiple adsorption/desorption cycles. Copyright (C) 2000 John Wiley and Sons, Ltd.
KW - Adsorption
KW - Flavour compounds
KW - Reversed-phase polystyrene
KW - Selectivity
KW - Separation technique
UR - http://www.scopus.com/inward/record.url?scp=0034066003&partnerID=8YFLogxK
U2 - 10.1002/(SICI)1099-1026(200003/04)15:2<108::AID-FFJ876>3.0.CO;2-4
DO - 10.1002/(SICI)1099-1026(200003/04)15:2<108::AID-FFJ876>3.0.CO;2-4
M3 - Article
AN - SCOPUS:0034066003
VL - 15
SP - 108
EP - 114
JO - Flavour and fragrance journal
JF - Flavour and fragrance journal
SN - 0882-5734
IS - 2
ER -