New stationary phase polarity parameters considering the electric intermolecular interactions in gas chromatographic column

1987 ◽  
Vol 23 (3) ◽  
pp. 195-198 ◽  
Author(s):  
A. Voelkel
Keyword(s):  
Stationary Phase ◽  
Intermolecular Interactions ◽  
Chromatographic Column ◽  
Stationary Phase Polarity ◽  
New Stationary Phase ◽  
Polarity Parameters

A phenylenediamine-based carbon dot-modified silica stationary phase for hydrophilic interaction chromatography

The Analyst ◽  
2020 ◽  
Vol 145 (3) ◽  
pp. 1056-1061 ◽  
Author(s):  
Yali Yang ◽  
Haijuan Zhang ◽  
Jia Chen ◽  
Zhan Li ◽  
Liang Zhao ◽  
...  
Keyword(s):  
Stationary Phase ◽  
Carbon Dots ◽  
Porous Silica ◽  
Hydrophilic Interaction Chromatography ◽  
Silica Spheres ◽  
Hydrophilic Interaction ◽  
Modified Silica ◽  
Carbon Dot ◽  
New Stationary Phase ◽  
Enhanced Selectivity

Red emitting carbon dots derived from p-phenylenediamine were successfully grafted onto the surface of porous silica spheres which served as a new stationary phase for hydrophilic interaction chromatography with enhanced selectivity.

A New Stationary Phase for Capillary Gas Chromatography: Calix[4]resorcinarene Functionalized with Imidazolium Cationic Units

2021 ◽  
Vol 84 (4) ◽  
pp. 325-333
Author(s):  
Xiaomin Shuai ◽  
Zhiqiang Cai ◽  
Xinyu Zhao ◽  
Yujie Chen ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Stationary Phase ◽  
Capillary Gas Chromatography ◽  
New Stationary Phase

scholarly journals Simultaneous determination of clobutinol hydrochloride and doxylamine succinate from syrups by RP HPLC using a new stationary phase containing embedded urea polar groups

2012 ◽  
Vol 48 (2) ◽  
pp. 315-323 ◽  
Author(s):  
Paulo Cesar Pires Rosa ◽  
Isabel Cristina Sales Fontes Jardim
Keyword(s):  
Stationary Phase ◽  
Simultaneous Determination ◽  
Reversed Phase ◽  
Hplc Method ◽  
Array Detector ◽  
Polar Groups ◽  
Ich Guidelines ◽  
Relative Standard ◽  
New Stationary Phase

A new, simple, fast, reproducible and sensitive reversed phase HPLC method, using a new stationary phase containing embedded urea polar groups, has been developed and validated for the simultaneous determination of clobutinol hydrochloride (CLO) and doxylamine succinate (DOX) in syrups. The determination was carried out on a C8 urea column (125 mm x 3.9 mm i.d., 5 µm particle size) synthetized at the Liquid Chomatography Laboratory (LabCrom) of the Chemistry Institute of Unicamp. The mobile phase consisted of a mixture of acetonitrile:methanol:phosphate buffer (pH 2.5) in the gradient mode. The diode array detector (DAD) was operated at 230 nm for CLO and 262 nm for DOX. The method showed adequate precision, with relative standard deviations (RSD) less than 1%. The presence of the excipients did not interfere in the results of the analysis. Accuracy was determined by adding standards of the drugs to a placebo and good recovery values were obtained. The analytical curves were linear (r² 0.9999 for CLO and 0.9998 for DOX) over a wide concentration range (2.4-336 µg mL-1 for CLO and 2.3-63 µg mL-1 for DOX). The solutions were stable for at least 72 hours at room temperature. The criteria for validation using the ICH guidelines were fulfilled.

Enantioselective Gas Chromatographic Separation of Racemic N-alkylated Barbiturates: Application of C11-Chirasil-Dex as Chiral Stationary Phase in GC

2007 ◽  
Vol 2 ◽  
pp. 117739010700200
Author(s):  
Ashraf Ghanem
Keyword(s):  
Gas Chromatography ◽  
Stationary Phase ◽  
Chromatographic Separation ◽  
Chiral Stationary Phase ◽  
Enantiomeric Separation ◽  
Enantioselective Gas Chromatography ◽  
Gas Chromatographic Separation ◽  
New Stationary Phase

Chirasil-β-Dex containing an undecamethylene spacer (C11-Chirasil-Dex) was synthesized and used as chiral stationary phase (CSP) in enantioselective gas chromatography (GC). The versatility of the new stationary phase in the simultaneous enantiomeric separation of a set of N-alkylated barbiturates is demonstrated.

scholarly journals Dye Ligand Epoxide Chitosan/Alginate: A Potential New Stationary Phase for Human IgG Purification

2012 ◽  
Vol 30 (8-9) ◽  
pp. 701-711 ◽  
Author(s):  
Diego R. Gondim ◽  
Luana P. Lima ◽  
Maria C. M. de Souza ◽  
Igor T. L. Bresolin ◽  
Wellington S. Adriano ◽  
...  
Keyword(s):  
Stationary Phase ◽  
Human Igg ◽  
Igg Purification ◽  
New Stationary Phase

Determination of Dihydrocodeinone in Mixtures With Antihistamines

1963 ◽  
Vol 46 (4) ◽  
pp. 641-642
Author(s):  
Joseph Levine
Keyword(s):  
Sulfuric Acid ◽  
Stationary Phase ◽  
Chloroform Extract ◽  
Chromatographic Column ◽  
Chloroform Eluate ◽  
Measured Volume

Abstract Dihydrocodeinone is separated from pheniramine and similar antihistamines by passage of a chloroform extract of the combined bases over a chromatographic column on which 2N HCl is the stationary phase. The latter is retained on the column while the dihydrocodeinone passes through. The dihydrocodeinone is transferred from the chloroform eluate by shaking it with a measured volume of sulfuric acid, and the concentration is measured spectrophotometrically. The method is recommended for adoption as official, first action.

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