Water quality. Determination of parathion, parathion-methyl and some other organophosphorus compounds in water by dichloromethane extraction and gas chromatographic analysis

1999 ◽  
Keyword(s):  
Water Quality ◽  
Chromatographic Analysis ◽  
Organophosphorus Compounds ◽  
Gas Chromatographic Analysis

Gas Chromatographic Determination of 2,4-D and 2,4,5-T and Their Derivatives in Commercial Formulations

1965 ◽  
Vol 48 (2) ◽  
pp. 327-333
Author(s):  
Patricia L Pursley ◽  
E D Schall
Keyword(s):  
Gas Chromatography ◽  
Chromatographic Analysis ◽  
Methyl Esters ◽  
Chromatographic Determination ◽  
Dichlorophenoxyacetic Acid ◽  
Alkyl Esters ◽  
Boron Trichloride ◽  
Acid Gas ◽  
Gas Chromatographic Analysis

Abstract A solution of boron trichloride in methanol was employed for the complete transcsterification of 2,4-D and 2,4,5-T esters to the corresponding methyl esters. Gas chromatographic analysis of the methyl esters permitted mixtures of 2,4-D and 2,4,5-T esters in commercial formidations to be analyzed both qualitatively and quantitatively with no sample cleanup. The method is highly specific and detected the presence of other contaminating isomers of dichlorophenoxyacetic acid. Gas chromatography was also used to qualitatively analyze mixtures of various alkyl esters of 2,4-D.

Gas chromatographic analysis of free fatty acids. Part 2: Determination of free fatty acids during anaerobic putrefaction

1987 ◽  
Vol 7 (5) ◽  
pp. 479-483 ◽  
Author(s):  
S. Pörschmann ◽  
J. Pörschmann ◽  
L. Liebetrau ◽  
I. Kühn ◽  
R. Pätz
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Chromatographic Analysis ◽  
Gas Chromatographic Analysis
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