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Enantioseparation of imazalil residue in orange by capillary electrophoresis with 2-hydroxypropyl-β-cyclodextrin as a chiral selector

Identifieur interne : 002D22 ( Main/Merge ); précédent : 002D21; suivant : 002D23

Enantioseparation of imazalil residue in orange by capillary electrophoresis with 2-hydroxypropyl-β-cyclodextrin as a chiral selector

Auteurs : Shuji Kodama [Japon] ; Atsushi Yamamoto [Japon] ; Takashi Ohura [Japon] ; Akinobu Matsunaga [Japon] ; Toshio Kanbe [Japon]

Source :

Journal of agricultural and food chemistry : (Print) [ 0021-8561 ] ; 2003.

RBID : Pascal:04-0069731

Descripteurs français

Pascal (Inist)
- Enantiomère, Procédé séparation, Résidu traitement, Méthode mesure, Electrophorèse capillaire, Méthode, Enantiosélectivité, Dégradation, Citrus sinensis, Cyclodextrine, 2-Hydroxypropyl-β-cyclodextrine, Imazalil.

English descriptors

KwdEn :
- Capillary electrophoresis, Citrus sinensis, Cyclodextrin, Degradation, Enantiomer, Enantioselectivity, Measurement method, Method, Separation process, Treatment residue.

Abstract

Chiral resolution of imazalil, a fungicide, was performed by capillary electrophoresis (CE) using 2-hydroxypropyl-β-cyclodextrin as a chiral selector. Factors affecting the chiral resolution and migration time of imazalil were studied. The optimum running conditions were found to be 5 mM ammonium dihydrogenphosphate-50 mM phosphate buffer (pH 3.0) containing 4 mM 2-hydroxypropyl-β-cyclodextrin with an effective voltage of +25 kV at 20 °C using direct detection at 200 nm. Under these conditions, the resolution (Rs) of racemic imazalil was ∼6. The extraction of imazalil from orange samples was done with acetonitrile under basic conditions. The extract was purified with a solid-phase extraction cartridge (Sep-Pak plus PS-2) and was analyzed by the above CE method. Eight orange samples were analyzed, and imazalil was detected in seven samples. In four of these seven oranges, the level of (-)-imazalil was the same as that of (+)-imazalil, but in the other three oranges, the level of (-)-imazalil was found to be lower than that of (+)-imazalil, suggesting that (-)-imazalil was degraded more quickly than (+)-imazalil in oranges.

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Pascal:04-0069731

Le document en format XML

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<front><div type="abstract" xml:lang="en">Chiral resolution of imazalil, a fungicide, was performed by capillary electrophoresis (CE) using 2-hydroxypropyl-β-cyclodextrin as a chiral selector. Factors affecting the chiral resolution and migration time of imazalil were studied. The optimum running conditions were found to be 5 mM ammonium dihydrogenphosphate-50 mM phosphate buffer (pH 3.0) containing 4 mM 2-hydroxypropyl-β-cyclodextrin with an effective voltage of +25 kV at 20 °C using direct detection at 200 nm. Under these conditions, the resolution (Rs) of racemic imazalil was ∼6. The extraction of imazalil from orange samples was done with acetonitrile under basic conditions. The extract was purified with a solid-phase extraction cartridge (Sep-Pak plus PS-2) and was analyzed by the above CE method. Eight orange samples were analyzed, and imazalil was detected in seven samples. In four of these seven oranges, the level of (-)-imazalil was the same as that of (+)-imazalil, but in the other three oranges, the level of (-)-imazalil was found to be lower than that of (+)-imazalil, suggesting that (-)-imazalil was degraded more quickly than (+)-imazalil in oranges.</div>
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<tree><country name="Japon"><noRegion><name sortKey="Kodama, Shuji" sort="Kodama, Shuji" uniqKey="Kodama S" first="Shuji" last="Kodama">Shuji Kodama</name>
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Enantioseparation of imazalil residue in orange by capillary electrophoresis with 2-hydroxypropyl-β-cyclodextrin as a chiral selector

Enantioseparation of imazalil residue in orange by capillary electrophoresis with 2-hydroxypropyl-β-cyclodextrin as a chiral selector

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri