Gas chromatographic determination of cocaine in whole blood and plasma using a nitrogen-sensitive flame ionization detector

1977 ◽  
Vol 135 (1) ◽  
pp. 141-148 ◽  
Author(s):  
Barry H. Dvorchik ◽  
Stephen H. Miller ◽  
William P. Graham
Keyword(s):  
Whole Blood ◽  
Chromatographic Determination ◽  
Flame Ionization Detector ◽  
Ionization Detector ◽  
Flame Ionization

Rapid Gas-Chromatographic Determination of Amphetamine and Methamphetamine in Urine

1974 ◽  
Vol 20 (11) ◽  
pp. 1460-1462 ◽  
Author(s):  
Naresh C Jain ◽  
Thomas C Sneath ◽  
Robert D Budd
Keyword(s):  
Gas Chromatography ◽  
Quantitative Result ◽  
Chromatographic Determination ◽  
Flame Ionization Detector ◽  
Specific Method ◽  
Ionization Detector ◽  
Rapid Procedure ◽  
Flame Ionization ◽  
Dual Analysis

Abstract A simple, rapid procedure is described for measuring amphetamine and methamphetamine in urine by gas chromatography, with use of a flame ionization detector. This method is sensitive to subtherapeutic concentrations (0.1 µg/ml or less), and is especially useful in clinical situations where an accurate and quantitative result is needed in less than 30 min. With the method, amphetamine and methamphetamine can be determined as the free bases on a 10% Apiezon L-10% KOH column and as their trifluoroacetamide derivatives on a 3% OV-17 column. This dual analysis eliminates false positives and any interfering substances that may be present in the urine, and is thus a specific method for the two drugs.

Gas-Liquid Chromatographic Determination of IV-Octylbicycloheptene Dicarboximide

1975 ◽  
Vol 58 (4) ◽  
pp. 845-849
Author(s):  
Vernon J Meinen
Keyword(s):  
Quantitative Determination ◽  
Chromatographic Determination ◽  
Flame Ionization Detector ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Preliminary Work ◽  
Technical Material ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A gas-liquid chromatographic (GLC) method is described for the quantitative determination of /V-octylbicycloheptene dicarboximide (MGK 264 synergist) in technical materials and in various formulations. The samples are diluted with acetone and analyzed by GLC, using a flame ionization detector and a column packed with OV-1 on Chromosorb W (HP). Preliminary work indicates that satisfactory results can be obtained with the technical material and several different formulations.

Gas-Liquid Chromatographic Determination of Sorbitol in Cooked Sausage Products

1978 ◽  
Vol 61 (1) ◽  
pp. 164-166
Author(s):  
Fred A Moseley ◽  
Joel S Salinsky ◽  
Robert W Woods
Keyword(s):  
Chromatographic Determination ◽  
Flame Ionization Detector ◽  
Gas Chromatograph ◽  
Ionization Detector ◽  
Simple Method ◽  
Flame Ionization ◽  
Freeze Dried ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A rapid and simple method of analysis has been developed for sorbitol in cooked sausage products. Sorbitol is extracted from cooked sausage products with water, an aliquot of the extract is freeze-dried, and the trimethylsilyl (TMS) derivative of sorbitol is formed. An aliquot of the TMS-sorbitol is injected into a gas chromatograph and measured by a flame ionization detector. Analysis of fortified samples shows that the recovery compares well with known amounts of sorbitol added.

Gas Chromatographic Determination of Phosphamidon Insecticide in Formulations

1972 ◽  
Vol 55 (6) ◽  
pp. 1331-1335 ◽  
Author(s):  
A A Carlstrom
Keyword(s):  
Coefficient Of Variation ◽  
Internal Standard ◽  
Chromatographic Determination ◽  
Flame Ionization Detector ◽  
Gas Chromatograph ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Wide Range ◽  
Peak Areas

Abstract The GLC method described is specific for measuring 4 components of Phosphamidon Insecticide—deschlorophosphamidon, α-phosphamidon, β-phosphamidon, and γ-chlorophosphamidon. The sample is extracted with acetone, an internal standard (dicyclohexyl phthalate) is added, and the solution is diluted to volume and injected into a gas chromatograph equipped with a flame ionization detector. Although the GLC peak areas for phosphamidon are not linear over a wide range of concentration, good results are obtained when sample and standard concentrations are matched to within 10%. A 1.21% coefficient of variation was found for 19 repetitive injections.

Collaborative Study of the Gas Chromatographic Determination of Six Thiocarbamate Herbicides in Formulations

1974 ◽  
Vol 57 (1) ◽  
pp. 53-59
Author(s):  
James E Barney
Keyword(s):  
Gas Chromatography ◽  
Systematic Error ◽  
Coefficient Of Variation ◽  
Collaborative Study ◽  
Internal Standard ◽  
Chromatographic Determination ◽  
Flame Ionization Detector ◽  
Ionization Detector ◽  
Flame Ionization

Abstract Eptam, Ordram, Ro-Neet, Sutan, Tillam, and Vernam thiocarbamate herbicides are determined in emulsifiable and granular formulations by gas chromatography on an OV-1, SE-30, or OV-17 column with a flame ionization detector. Another thiocarbamate is used as an internal standard. The method was tested collaboratively by 19 laboratories, 18 of which tested the method on all 6 thiocarbamates. The coefficient of variation for 12 formulations was 3.10%. A significant amount of systematic error was detected, particularly in the analysis of emulsifiable formulations. The method has been adopted as official first action, and it is recommended that additional studies be conducted.

Gas-Liquid Chromatographic Determination of Resmethrin in Corn, Cornmeal, Flour, and Wheat

1975 ◽  
Vol 58 (5) ◽  
pp. 1032-1036
Author(s):  
Richard A Simonaitis ◽  
R Spencer Cail
Keyword(s):  
Ethyl Acetate ◽  
Chromatographic Determination ◽  
Flame Ionization Detector ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract gas-liquid chromatographic (GLC) method was developed for the determination of residues of resmethrin ((5-benzyl-3-furyl)methyl cistraras-(±)- 2,2-dimethyl-3-(2-methylpropenyl)-cyclopropanecarboxylate) in corn, cornmeal, flour, and wheat. The commodity, fortified with resmethrin, was extracted by tumbling with pentane and transferred to acetonitrile, the fat was partitioned off, and the sample was chromatographed with 3% ethyl acetate in pentane on Florisil containing 0.5% water. The resmethrin residue was determined by GLC with a flame ionization detector. The results were compared with known standards that had undergone the same cleanup procedures. The method was sensitive to concentrations of resmethrin to 0.2 ppm, recoveries averaged 83%, and reproducibility was good.

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