Separation of the main components of raw acetonine by normal-phase liquid chromatography

1987 ◽  
Vol 52 (6) ◽  
pp. 1407-1415
Author(s):  
Milena Vespalcová ◽  
Radim Vespalec
Keyword(s):  
Aqueous Solution ◽  
Liquid Chromatography ◽  
Mobile Phase ◽  
Room Temperature ◽  
Ammonium Hydroxide ◽  
Normal Phase ◽  
Aliphatic Hydrocarbon ◽  
Separation Procedure ◽  
Phase Liquid ◽  
Main Components

The separation procedure of raw acetonine, that is unstable at the room temperature, has been worked out. Alumina was used as the stationary phase. The mixture of an aliphatic hydrocarbon with an alcohol saturated with the concentrated aqueous solution of ammonium hydroxide was used as the mobile phase. It has been proved that the result of the analysis at the room temperature was not affected by the spontaneous decomposition of the sample provided that the analysis did not exceed 30 min. Raw acetonine was found to contain ten components, four of which were identified.

Normal-Phase Liquid Chromatography of Plant Hormones Using Reversed Cholic Acid Micelles as the Mobile Phase

1996 ◽  
Vol 68 (17) ◽  
pp. 3029-3032 ◽  
Author(s):  
A. Navas Díaz ◽  
A. García Pareja ◽  
F. García Sánchez
Keyword(s):  
Liquid Chromatography ◽  
Cholic Acid ◽  
Plant Hormones ◽  
Mobile Phase ◽  
Normal Phase ◽  
Phase Liquid

scholarly journals Modeling of the influence of the modifier concentration on the retention process in NP-HPLC

2008 ◽  
Vol 10 (1) ◽  
pp. 52-56
Author(s):  
Wojciech Zapała
Keyword(s):  
Liquid Chromatography ◽  
Standard Deviation ◽  
Mobile Phase ◽  
Theoretical Data ◽  
Normal Phase ◽  
Adsorption Model ◽  
Data Approximation ◽  
Retention Models ◽  
Binary Mobile Phase ◽  
Phase Liquid

Modeling of the influence of the modifier concentration on the retention process in NP-HPLC The adsorption model for an accurate prediction of the analyte retention in the normal - phase liquid chromatography with a binary mobile phase has been proposed. This model was derived using a thermody-namically consistent modified competitive Langmuir isotherm. The performance of the proposed equation was compared with two retention models reported in literature. All models were verified for different NP-LC systems by use of three criteria: the sum of squared differences between the experimental and theoretical data, approximation of the standard deviation and the Fisher test.

scholarly journals Selectivity in normal-phase liquid chromatography with binary mobile phase

Adsorption ◽  
2010 ◽  
Vol 16 (4-5) ◽  
pp. 397-403 ◽  
Author(s):  
Małgorzata Borówko ◽  
Barbara Ościk-Mendyk
Keyword(s):  
Liquid Chromatography ◽  
Mobile Phase ◽  
Normal Phase ◽  
Binary Mobile Phase ◽  
Phase Liquid

Hexamethyldisiloxane as a mobile phase component for normal phase liquid chromatography

1996 ◽  
Vol 43 (11-12) ◽  
pp. 647-653 ◽  
Author(s):  
N. D. Danielson ◽  
C. L. Goldhammer ◽  
J. R. Bowser ◽  
P. F. Gavin
Keyword(s):  
Liquid Chromatography ◽  
Mobile Phase ◽  
Normal Phase ◽  
Phase Component ◽  
Phase Liquid ◽  
Mobile Phase Component

Elucidation of Carotenoid Patterns in Citrus Products by Means of Comprehensive Normal-Phase × Reversed-Phase Liquid Chromatography

2006 ◽  
Vol 78 (22) ◽  
pp. 7743-7750 ◽  
Author(s):  
Paola Dugo ◽  
Veronika Škeříková ◽  
Tiina Kumm ◽  
Alessandra Trozzi ◽  
Pavel Jandera ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Reversed Phase ◽  
Normal Phase ◽  
Reversed Phase Liquid Chromatography ◽  
Phase Liquid
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