Column packings for gas-liquid chromatography by coating the stationary phase, as a vapour, on the solid support using a fluidized-bed technique

1978 ◽  
Vol 148 (2) ◽  
pp. 495-499 ◽  
Author(s):  
N.D. Petsev ◽  
A. Kostova ◽  
P.I. Filchev
Keyword(s):  
Liquid Chromatography ◽  
Stationary Phase ◽  
Fluidized Bed ◽  
Solid Support ◽  
Gas Liquid Chromatography ◽  
Column Packings

Gas-Liquid Chromatographic Determination of Anethole in Liqueurs

1974 ◽  
Vol 57 (4) ◽  
pp. 954-956
Author(s):  
Robert G Parker
Keyword(s):  
Liquid Chromatography ◽  
Stationary Phase ◽  
Chromatographic Determination ◽  
Solid Support ◽  
Gas Liquid Chromatography ◽  
Significant Difference ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract In the method described, anethole is extracted from the liqueur sample with chloroform, which eliminates interference from the large amount of sugar present, and is determined by gas-liquid chromatography, using 10% K-20M Carbowax as stationary phase on Chromosorb W (AWDMCS) as solid support. Anethole concentrations were measured in 8 different bottle samples, consisting of 4 different brands produced by 3 different manufacturers. There is a significant difference in the anethole concentration for the 4 brands tested.

Quantitation of anticonvulsant drugs in serum by gas-chromatography on the stationary phase SP-2510.

1978 ◽  
Vol 24 (3) ◽  
pp. 483-485 ◽  
Author(s):  
W Godolphin ◽  
J Thoma
Keyword(s):  
Gas Chromatography ◽  
Liquid Chromatography ◽  
Stationary Phase ◽  
Serum Cholesterol ◽  
Anticonvulsant Drugs ◽  
Gas Liquid Chromatography ◽  
Column Packing ◽  
Extraction Procedures

Abstract A new column packing, SP-2510 DA (Supelco, Inc., Bellefonte, Pa. 16823), is an excellent stationary phase for the determination of a wide variety of anticonvulsant drugs by gas--liquid chromatography without derivatization. However, when uncomplicated extraction procedures are used, serum cholesterol interferes with the determination of primidone. By the simple expedient of adding a short "pre-column" containing another phase (SP-2250 DA) the problem is overcome.

THE SEPARATION OF SOME TERPENOID COMPOUNDS BY GAS–LIQUID CHROMATOGRAPHY

1960 ◽  
Vol 38 (5) ◽  
pp. 631-640 ◽  
Author(s):  
E. von Rudloff
Keyword(s):  
Liquid Chromatography ◽  
Polyethylene Glycol ◽  
Liquid Phase ◽  
Diatomaceous Earth ◽  
Solid Support ◽  
Gas Liquid Chromatography ◽  
Polyphenyl Ether ◽  
Liquid Phases ◽  
Degree Of Separation ◽  
Separation Of Mixtures

A study has been made of the degree of separation of mixtures of some terpene hydrocarbons, some of their oxygenated derivatives, two sesquiterpene alcohols, and three monophenols on a variety of columns. Temperature and sample size affected the degree of separation and the solid support Chromosorb W, a calcined diatomaceous earth, was found to combine the advantages of Celite and C-22 firebrick without causing decomposition of the sample at higher temperatures. When Craig polyesters were used as liquid phases, separations equal to those obtained on polyethylene glycol were realized with the added advantage that these produced columns which are stable at 190 to 220 °C. Consequently, sesquiterpene alcohols and monophenols were also separated successfully. Another useful liquid phase for both low and high temperatures was found in a meta-linked polyphenyl ether. Squalene was found to be an efficient liquid phase for the separation of terpene hydrocarbons at 130 °C and lower. The possible application of the present findings for preparative work is discussed.

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