Herbicide Residues, Determination of Amiben in Tomatoes by Electron Affinity Gas Chromatography

1964 ◽  
Vol 12 (2) ◽  
pp. 185-187 ◽  
Author(s):  
C. A. Bache ◽  
W. H. Gutenmann ◽  
D. J. Lisk
Keyword(s):  
Gas Chromatography ◽  
Electron Affinity ◽  
Herbicide Residues ◽  
Residues Determination

Determination of cereal herbicide residues in environmental samples by gas chromatography

1996 ◽  
Vol 754 (1-2) ◽  
pp. 347-365 ◽  
Author(s):  
J.L. Tadeo ◽  
C. Sanchez-Brunete ◽  
A.I. García-Valcarcel ◽  
L. Martínez ◽  
R.A. Pérez
Keyword(s):  
Gas Chromatography ◽  
Environmental Samples ◽  
Herbicide Residues

Determination of Herbicides in Oils

1964 ◽  
Vol 47 (6) ◽  
pp. 1116-1119
Author(s):  
George Yip
Keyword(s):  
Gas Chromatography ◽  
Sodium Bicarbonate ◽  
Vegetable Oils ◽  
Sodium Bicarbonate Solution ◽  
Herbicide Residues ◽  
Better Than

Abstract A method has been developed which will determine 2,4-D, 2,3,6-TBA, MCPA, PCP, 2,4-DB, 2,4,5-T, and 2,4,5-TP in vegetable oils. The method involves extraction of 50 g oil with sodium bicarbonate solution, acidification, and extraction of the herbicides with chloroform. After esterification with diazomethane, the residue is analyzed by programmed temperature gas chromatography. Recoveries were better than 90% in the range 0.02-0.08 ppm. Commercial oils were analyzed and were found to be free from these herbicide residues.

Analysis of Imidan Colorimetrically and by Electron-Affinity Gas Chromatography

1965 ◽  
Vol 48 (5) ◽  
pp. 922-926
Author(s):  
Malcolm C Bowman ◽  
Morton Beroza
Keyword(s):  
Gas Chromatography ◽  
Electron Affinity ◽  
Chromatographic Method ◽  
Sweet Corn ◽  
Chromotropic Acid ◽  
Hydrolytic Cleavage ◽  
Corn Plants ◽  
Gas Chromatographic Method ◽  
Colorimetric Procedure

Abstract A procedure for analyzing Imidan® colorimetrically is based on the acid hydrolytic cleavage of formaldehyde from the molecule and the determination of the liberated formaldehyde with chromotropic acid by the Eegriwe reaction. Recoveries of the pesticide from milk ranged from 75 to 88% in the 0.5–5.0 ppm range. A gas chromatographic method, also devised, required less cleanup and was faster, more accurate, more sensitive, and more specific than the colorimetric procedure. Recoveries of Imidan from milk at levels of 0.01–5 ppm ranged from 93 to 101% ; from whole sweet corn plants recoveries at levels of 0.05–10.0 ppm were from 94 to 106%.

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