A dual-column gas chromatographic method for the analysis of inorganic gases and C1−C2 hydrocarbons produced during radiolysis of acetic acid

1970 ◽  
Vol 3 (8) ◽  
pp. 359-362 ◽  
Author(s):  
S. Lukáč
Keyword(s):  
Acetic Acid ◽  
Chromatographic Method ◽  
Gas Chromatographic Method ◽  
Dual Column ◽  
C2 Hydrocarbons

Gas-Solid Chromatographic Procedures for Determining Acrylonitrile Monomer in Acrylonitrile-Containing Polymers and Food Simulating Solvents

1978 ◽  
Vol 61 (6) ◽  
pp. 1383-1388
Author(s):  
Margaret E Brown ◽  
Charles V Breder ◽  
Timothy P Mcneal
Keyword(s):  
Acetic Acid ◽  
Polymer Matrix ◽  
Chromatographic Method ◽  
Direct Injection ◽  
Migration Studies ◽  
Quantitation Limit ◽  
Food Simulant ◽  
Nitrogen Phosphorus Detector ◽  
Gas Chromatographic Method ◽  
Nitrogen Phosphorus

Abstract A gas chromatographic method is described for acrylonitrile monomer (AN), using a nitrogen/phosphorus detector. Procedures for the analysis of AN in 5 food simulants (water, 3% acetic acid, heptane, 50% ethanol, and 8% ethanol) as well as in the polymer matrix are included. The quantitation limit for direct injection of AN/food simulant solution is 0.04 ng AN/μl. AN-based polymers are dissolved in N,N-dimethylacetamide and injected directly. Residual AN in the polymer can be quantitated at the 0.5 ng/μl level. Results of migration studies are also presented.

Rapid Method for the Extraction, Cleanup, and GLC Determination of Toxic Residues of Temik

1969 ◽  
Vol 52 (4) ◽  
pp. 786-789
Author(s):  
Jay C Maitlen ◽  
Leslie M Mcdonough ◽  
Morton Beroza
Keyword(s):  
Hydrogen Peroxide ◽  
Gas Chromatography ◽  
Acetic Acid ◽  
Rapid Method ◽  
Chromatographic Method ◽  
Original Procedure ◽  
Time Required ◽  
Gas Chromatographic Method

Abstract The gas chromatographic method previously reported for determining the toxic residues of Temik was modified. The combined toxic residues are extracted from the crop with dichloromethane, the extract is evaporated onto a n adsorbent mixture, and the residue is extracted with acetonitrile, oxidized by hydrogen peroxide-acetic acid, chromatographed through Florisil, and analyzed by gas chromatography. The time needed to analyze samples in batches of 10 was reduced to 1.8 hr/sample, or less than half the time required for the original procedure. The sensitivity of the method applied to apples, potatoes, cucumbers, alfalfa, and cottonseed ranged from 0.007 to 0.010 ppm, and recoveries from samples fortified with 0.02 to 1.50 ppm pesticide ranged from 72 to 114%.

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