Quantitative Analysis of Submicrogram Amounts of High Boiling Compounds by Flame Ionization Gas Liquid Chromatography.

1963 ◽  
Vol 35 (9) ◽  
pp. 1186-1192 ◽  
Author(s):  
F. A. Vandenheuvel
Keyword(s):  
Liquid Chromatography ◽  
Quantitative Analysis ◽  
Gas Liquid Chromatography ◽  
Flame Ionization

Ozonolysis of unsaturated fatty acids. II. Esterification of the total products from the oxidative decomposition of ozonides with 2,2-dimethoxypropane

1967 ◽  
Vol 45 (13) ◽  
pp. 1405-1410 ◽  
Author(s):  
John D. Castell ◽  
R. G. Ackman
Keyword(s):  
Fatty Acids ◽  
Liquid Chromatography ◽  
Unsaturated Fatty Acids ◽  
Performic Acid ◽  
Acid Oxidation ◽  
Gas Liquid Chromatography ◽  
Positional Isomers ◽  
Flame Ionization ◽  
Hydrogen Flame

The total acidic products from the performic acid oxidation of the ozonide of methyl oleate formed in methanol may be esterified directly in a few hours with 2,2-dimethoxypropane. The ester concentrations are adequate for the determination of the positional isomers of monoethylenic fatty acids directly from the reaction mixture, using a hydrogen flame ionization gas–liquid chromatography detector. Dimethyl sulfoxide was not required to prevent the breakdown of 2,2-dimethoxypropane under the conditions employed.

scholarly journals Quantitative analysis of cholesterol in foods by gas-liquid chromatography.

1980 ◽  
Vol 26 (5) ◽  
pp. 497-505 ◽  
Author(s):  
Takashi KANEDA ◽  
Atsuko NAKAJIMA ◽  
Kenshiro FUJIMOTO ◽  
Tadashi KOBAYASHI ◽  
Shuhachi KIRIYAMA ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Quantitative Analysis ◽  
Gas Liquid Chromatography

Determination of Phenothiazine and Several of its Derivatives by Gas-Liquid Chromatography

1966 ◽  
Vol 49 (4) ◽  
pp. 857-859
Author(s):  
C L Bramlett
Keyword(s):  
Liquid Chromatography ◽  
Internal Standard ◽  
Flame Ionization Detector ◽  
Gas Liquid Chromatography ◽  
Chromatographic Technique ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Hydrogen Flame

Abstract Phenothiazine, promethazine.HCl, chlorpromazine. HCl, promazine.HCl, and levomepromazine. HCl were chromatographed satisfactorily on a column containing 5% Apiezon L coated on Anakrom ABS, 100/110 mesh, using a hydrogen-flame ionization detector. This gas chromatographic technique is rapid and more specific than existing official methods. The use of an internal standard to improve precision will be investigated.

High-Performance and Gas-Liquid Chromatography of Methyl Parathion Formulations

1976 ◽  
Vol 59 (4) ◽  
pp. 740-744
Author(s):  
Edwin R Jackson
Keyword(s):  
Liquid Chromatography ◽  
High Performance ◽  
Methyl Parathion ◽  
Hplc Method ◽  
Gas Liquid Chromatography ◽  
Synthetic Sample ◽  
Average Value ◽  
Flame Ionization ◽  
Ultraviolet Detector ◽  
Technical Material

Abstract Methyl parathion formulations (a synthetic sample, a technical material, and 6 emulsifiable concentrates) were analyzed by high-performance liquid chromatography (HPLC), gas-liquid chromatography (GLC), and infrared (IR) spectroscopy. The HPLC method used in ultraviolet detector and a Permaphase ODS column with a methanol-water mobile phase. The GLC method used an SE-30/OV-210 column and flame ionization detection. The IR spectrum was recorded at 8.16 μm. A synthetic sample formulated to contain 45.5% methyl parathion (analytical grade) was analyzed 8 times by each method. HPLC yielded an average value of 45.4%, GLC 45.9%, and IR 45.7%. Analyses of variance of this repeatability study showed that the differences between the GLC mean and both the theoretical value and the HPLC mean were small, but significant. Technical methyl parathion and 6 emulsifiable concentrates were analyzed in duplicate by each method. Variance calculations for each set of duplicates by each method indicate a high probability of difference in the methods. High results from the IR analysis are probably due to impurities in the technical material because analysis of the synthetic sample was satisfactory. The HPLC and GLC methods appear to be precise and will be studied collaboratively.

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.

Sign in / Sign up

Export Citation Format

Share Document