Relationships between temperature programmed and isothermal Kovats retention indices in gas-liquid chromatography

1982 ◽  
Vol 16 (1) ◽  
pp. 286-289 ◽  
Author(s):  
J. Lee ◽  
D. R. Taylor
Keyword(s):  
Liquid Chromatography ◽  
Retention Indices ◽  
Gas Liquid Chromatography ◽  
Kováts Retention Indices ◽  
Temperature Programmed

Capillary gas-liquid chromatography of pyridine alkyl homologues

1983 ◽  
Vol 48 (11) ◽  
pp. 3270-3278 ◽  
Author(s):  
Marta Novrocíková ◽  
Jan Novrocík ◽  
Jan Vymětal
Keyword(s):  
Experimental Data ◽  
Liquid Chromatography ◽  
Stationary Phases ◽  
Coal Tar ◽  
Retention Indices ◽  
Gas Liquid Chromatography ◽  
Kováts Retention Indices ◽  
Alkyl Groups ◽  
Kováts Indices

The Kováts retention indices (I) were determined by capillary gas-liquid chromatography on three stationary phases of different polarity, viz. OV-1, Ucon LB-550, and Reoplex 400, for 70 pyridine alkyl homologues present in coal tar. The increments for some alkyl groups were assessed, and the Kováts indices were predicted for 46 pyridine alkyl homologues and compared with the experimental data. The parameters of the linear dependences I(1) = kI(2) + q for pairs of stationary phases (1) and (2) were evaluated.

Simultaneous Determination of Urinary Estriol, Pregnanediol, and Pregnanolone by Gas-Liquid Chromatography

1969 ◽  
Vol 15 (3) ◽  
pp. 190-196 ◽  
Author(s):  
Robert D Baynton ◽  
Donald J Campbell
Keyword(s):  
Liquid Chromatography ◽  
Glycol Succinate ◽  
Urine Specimen ◽  
Gas Liquid Chromatography ◽  
Large Hospital ◽  
Flame Ionization ◽  
Trimethylsilyl Ethers ◽  
Hydrogen Flame ◽  
Progesterone Metabolites ◽  
Temperature Programmed

Abstract A simplified method for following the urinary excretion of estriol, pregnanediol, and pregnanolone during the course of pregnancy is presented. The procedure has been used successfully in a large hospital laboratory. An important advantage is that the estrogen and progesterone metabolites are measured simultaneously, and separate extraction and gas-liquid chromatography is not required. The urine specimen is hydrolyzed enzymatically, extracted, and the steroids are converted to trimethylsilyl ethers. Temperature-programmed gas-liquid chromatography is carried out on a 2% neopentyl glycol succinate column using a hydrogen flame ionization detector.

Simulation of column efficiency in temperature programmed gas-liquid chromatography

1995 ◽  
Vol 41 (5-6) ◽  
pp. 37-42 ◽  
Author(s):  
D. Messadi ◽  
L. Ferchichi ◽  
L. Nouar ◽  
N. Rebbani
Keyword(s):  
Liquid Chromatography ◽  
Gas Liquid Chromatography ◽  
Column Efficiency ◽  
Temperature Programmed
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