Determination of fatty acid composition by gas chromatography: II. Analysis with use of flame ionization detector

1973 ◽  
Vol 50 (9) ◽  
pp. 360-363 ◽  
Author(s):  
S. Watanabe ◽  
S. Nakasato ◽  
S. Hayano ◽  
H. Kuwamura ◽  
T. Nagai ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Flame Ionization Detector ◽  
Ionization Detector ◽  
Flame Ionization

scholarly journals Determination of Fatty Acid Composition by a Gas Chromatograph with a Flame Ionization Detector

1973 ◽  
Vol 22 (2) ◽  
pp. 95-101
Author(s):  
Shoichiro WATANABE ◽  
Satoshi NAKASATO ◽  
Hideo KUWAYAMA ◽  
Yukihiro SASAMOTO ◽  
Shinsaku SHIRAISHI ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Flame Ionization Detector ◽  
Gas Chromatograph ◽  
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.

Determination of Styrene Migration from Food-Contact Polymers into Margarine, Using Azeotropic Distillation and Headspace Gas Chromatography

1983 ◽  
Vol 66 (5) ◽  
pp. 1067-1073
Author(s):  
Sandra L Varner ◽  
Charles V Breder ◽  
Thomas Fazio
Keyword(s):  
Gas Chromatography ◽  
Azeotropic Distillation ◽  
Flame Ionization Detector ◽  
Headspace Gas Chromatography ◽  
Ionization Detector ◽  
Migration Studies ◽  
Flame Ionization ◽  
Quantitation Limit ◽  
Headspace Gas

Abstract Migration studies were conducted to determine the quantity of styrene that migrates from polymers into fatty foods, specifically margarine. Azeotropic distillation was used to isolate styrene from the margarine. Headspace gas chromatography with a Chromosorb 104 column and a flame ionization detector was used for quantitation. The quantitation limit for the method was about 25 ppb (wt/wt) styrene in margarine. On the average, greater than 90% of the styrene was recovered. Several commercial margarines were examined. The method and results of the migration studies are presented. There was no detectable migration of styrene into margarine.

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