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פותח על ידי קלירמאש פתרונות בע"מ -
Potassium halide-treated montmorillonite (KTM) as a solid phase in liquid chromatography
Year:
1993
Source of publication :
Clays and Clay Minerals
Authors :
מינגלגרין, אורי
;
.
Volume :
41
Co-Authors:
Tsvetkov, F., Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
Heller-Kallai, L., Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
Mingelgrin, U., Institute of Soils and Water, Agricultural Research Organization, Volcani Center, POB 6, Bet Dagan 50 250, Israel
Facilitators :
From page:
527
To page:
536
(
Total pages:
10
)
Abstract:
Columns for high pressure liquid chromatography were prepared from spray dried samples of montmorillonite that were heated with potassium halides (KTM) to increase both the cation density on the clay surfaces and the expandability of the interlayers. Some of the clay samples were exchanged with Cu before and/or after the potassium halide treatment. Retention of nitrobenzene and its chloro and methyl derivatives, of methyl substituted phenols and of nitrophenols on these columns was studied, using eluents ranging in polarity from hexane to isopropanol. The retention of the aromatic molecules depends on their specific interaction with active sites on the clay surfaces and on steric effects which limit access to the clay interlayers. Both penetrability and surface interaction are controlled by the composition and method of preparation of the solid phase and by the polarity of the mobile phase. Very strong adsorption of some eluates and efficient chromatographic separations between related substituted benzenes were achieved. Mixtures of the three isomers of cresol, chloronitrobenzene, nitrotoluene or nitrophenol were completely resolved by a judicious combination of solid phase and eluent. © 1993, The Clay Minerals Society.
Note:
Related Files :
Adsorption
Benzene
chromatography
Clay minerals
phenols
Substituted phenol
עוד תגיות
תוכן קשור
More details
DOI :
10.1346/CCMN.1993.0410502
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31260
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:01
Scientific Publication
Potassium halide-treated montmorillonite (KTM) as a solid phase in liquid chromatography
41
Tsvetkov, F., Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
Heller-Kallai, L., Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
Mingelgrin, U., Institute of Soils and Water, Agricultural Research Organization, Volcani Center, POB 6, Bet Dagan 50 250, Israel
Potassium halide-treated montmorillonite (KTM) as a solid phase in liquid chromatography
Columns for high pressure liquid chromatography were prepared from spray dried samples of montmorillonite that were heated with potassium halides (KTM) to increase both the cation density on the clay surfaces and the expandability of the interlayers. Some of the clay samples were exchanged with Cu before and/or after the potassium halide treatment. Retention of nitrobenzene and its chloro and methyl derivatives, of methyl substituted phenols and of nitrophenols on these columns was studied, using eluents ranging in polarity from hexane to isopropanol. The retention of the aromatic molecules depends on their specific interaction with active sites on the clay surfaces and on steric effects which limit access to the clay interlayers. Both penetrability and surface interaction are controlled by the composition and method of preparation of the solid phase and by the polarity of the mobile phase. Very strong adsorption of some eluates and efficient chromatographic separations between related substituted benzenes were achieved. Mixtures of the three isomers of cresol, chloronitrobenzene, nitrotoluene or nitrophenol were completely resolved by a judicious combination of solid phase and eluent. © 1993, The Clay Minerals Society.
Scientific Publication
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