scholarly journals Analytical Method Determination of Penconazole in some Emulsifiable Concentrate (EC) Formulations Using Gas Chromatography

2021 ◽  
Vol 12 (9) ◽  
pp. 627-630
Author(s):  
N. Khalil
Keyword(s):  
Gas Chromatography ◽  
Analytical Method ◽  
Emulsifiable Concentrate ◽  
Ec Formulations

Gas Chromatographic Determination of Primary and Secondary Amines as Pentafluorobenzamide Derivatives

1982 ◽  
Vol 65 (5) ◽  
pp. 1066-1072
Author(s):  
Brian D Ripley ◽  
Bruce J French ◽  
Lloyd V Edgington
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Analytical Method ◽  
Chromatographic Determination ◽  
Sample Volume ◽  
Secondary Amines ◽  
Primary And Secondary Amines

Abstract An analytical method is described for the determination of mono- and dialkylamines in foodstuffs. Amines are derivatized to their pentafluorobenzamides which may be separated by gas chromatography (GC) and determined using an N-P detector. Analysis of the derivatives by GC-mass spectrometry indicated they were all mono-substituted. The amines were isolated from foodstuffs by alkaline distillation of ≥75% sample volume. The distribution of dimethylamine (DMA) in distillate volumes indicated 2 maxima from barley and malt, which could represent 2 or more sources of DMA. DMA concentrations of 6.6-8.8 ppm in barley, 11 ppm in malt, and 1.2 ppm in beer are higher than previously reported.

Determination of the Herbicide Tordon (4-Amino-3,5,6- trichloropicolinic Acid) in Soil by Electron Capture Gas Chromatography

1967 ◽  
Vol 50 (3) ◽  
pp. 637-641
Author(s):  
J G Saha ◽  
L A Gadallah
Keyword(s):  
Gas Chromatography ◽  
Methyl Ester ◽  
Phosphoric Acid ◽  
Electron Capture ◽  
Analytical Method ◽  
Free Acid ◽  
Soil Samples ◽  
Minimum Amount

Abstract A method is presented for determining the herbicide tordon (4-amino-3,5,6-trichIoropicolinic acid) in soil. It involves extraction of tordon as the free acid with acetone and phosphoric acid, followed by esterification with diazomethane and estimation of the methyl ester by electron capture gas chromatography. Recoveries of tordon added to soil samples at 0.05—1.0 ppm were between 83 and 92%. The minimum amount detectable by this method was 0.01 ppm. The difficulties of developing an analytical method for this compound are discussed in the light of its structure and solubility

Note: A rapid method for the determination of lipids an fatty acids in bread by gas chromatography / Nota: Método rápido para la determinación de lípidos y ácidos grasos en pan mediante cromatografía de gases

1998 ◽  
Vol 4 (3) ◽  
pp. 207-210
Author(s):  
Y.A. Sultanovitch ◽  
O. Philipp ◽  
M. Schmelewa ◽  
H.D. Isengard
Keyword(s):  
Fatty Acids ◽  
Gas Chromatography ◽  
Solvent Extraction ◽  
Analytical Method ◽  
Extraction Method ◽  
Conversion Factor ◽  
High Sensitivity ◽  
Solvent Extraction Method ◽  
Conventional Solvent Extraction

A new simple and fast analytical method was developed to characterize the content of lipids and fatty acids in bread. First, fatty acids were determined by gas chromatography and then the content of lipids was calculated by using a conversion factor. This method gave very accurate results; it was three times faster than the conventional solvent extraction method and its consumption of solvent was much lower. The high sensitivity allowed the distribution of lipids in bread to be determined.

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