Fumigant residues in wheat and flour: solvent extraction and gas-chromatographic determination of free methyl bromide and ethylene oxide

The Analyst ◽  
1968 ◽  
Vol 93 (1105) ◽  
pp. 252 ◽  
Author(s):  
S. G. Heuser ◽  
K. A. Scudamore
Keyword(s):  
Solvent Extraction ◽  
Ethylene Oxide ◽  
Methyl Bromide ◽  
Chromatographic Determination

scholarly journals Gas Chromatographic Determination of Traces of Accelerants in Physical Evidence

1972 ◽  
Vol 55 (4) ◽  
pp. 840-845 ◽  
Author(s):  
Charles R Midkiff ◽  
Willard D Washington
Keyword(s):  
Liquid Chromatography ◽  
Solvent Extraction ◽  
Vapor Phase ◽  
Selection Criteria ◽  
Chromatographic Determination ◽  
Operating Parameters ◽  
Gas Liquid Chromatography ◽  
Internal Standards ◽  
Physical Evidence

Techniques developed for use with gas-liquid chromatography for the examination of evidence collected at the scene of suspected arson fires and firebombings are discussed. Both solvent extraction and vapor phase examinations are employed. Internal standards are used for the identification of specific components in actual samples to allow confirmation of hydrocarbon type, e.g., gasoline and kerosene. Operating parameters and solvent selection criteria are included. Results obtained from known materials and residual hydrocarbons in actual samples are compared.

Quantitative thin-layer chromatographic determination of bromide(1-) residues in crops after soil treatment by methyl bromide

1979 ◽  
Vol 27 (1) ◽  
pp. 132-134 ◽  
Author(s):  
Luc A. Gordts ◽  
Andre Vandezande ◽  
Pieter P. Van Cauwenberge ◽  
Willy Van Haver
Keyword(s):  
Thin Layer ◽  
Methyl Bromide ◽  
Chromatographic Determination ◽  
Soil Treatment

Headspace gas chromatographic determination of ethylene oxide in air

1986 ◽  
Vol 21 (12) ◽  
pp. 701-704 ◽  
Author(s):  
R. Binetti ◽  
S. Di Marzio ◽  
P. Di Prospero ◽  
L. Gramiccioni ◽  
G. Viviano ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Chromatographic Determination ◽  
Headspace Gas

Gas-Liquid Chromatographic Determination of Dioxathion and Quintiofos in Organophosphorus Dip Washes

1980 ◽  
Vol 63 (1) ◽  
pp. 33-36
Author(s):  
Molly I Keating
Keyword(s):  
Solvent Extraction ◽  
Extraction Procedure ◽  
Internal Standard ◽  
Chromatographic Determination ◽  
Phosphorus Compounds ◽  
Ionization Detector ◽  
Liquid Chromatographic Determination ◽  
Gasliquid Chromatography ◽  
Liquid Chromatographic

Abstract A rapid method for the analysis of dip washes is described which eliminates the usual solvent extraction procedure. The dip wash is initially diluted with acetone and then with petroleum ether. The diluted dip wash is analyzed by gasliquid chromatography, using an alkali ionization detector sensitive to phosphorus compounds. The method was applied to the determination of dioxathion (2,3-ρ-dioxanedithiol S,S-bis(O,O-diethyl phosphorodithioate)), and quintiofos (O-ethyl O-8-quinolyl phenylphosphonothioate) dip washes. Average recoveries from fouled dip washes were 100 and 104%. GLC of these compounds with an internal standard is described, which improves the precision of the method to ±2%.

High Pressure Liquid Chromatographic Determination of the Five Major Alkaloids in Papaver somniferum L. and Thebaine in Papaver bracteatum Lindl. Capsular Tissue

1979 ◽  
Vol 62 (2) ◽  
pp. 310-314
Author(s):  
Phillip G Vincent ◽  
Beatriz Ferreira Engelke
Keyword(s):  
High Pressure ◽  
Solvent Extraction ◽  
Chromatographic Determination ◽  
Papaver Somniferum ◽  
High Pressure Liquid Chromatographic ◽  
Papaver Bracteatum ◽  
Single Column ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A high pressure liquid chromatographic isocratic procedure is described for determining and quantitating the 5 major alkaloids narcotine, papaverine, thebaine, codeine, and morphine in Papaver somniferum L. and thebaine in Papaver bracteatum Lindl. Other papaveraceous alkaloids, including salutaridine, oripavine, laudanosine, isothebaine, cryptopine, alpinigenine, narceine, protopine, and gnoscopine, were also quantitated. The values for morphine, codeine, and thebaine in P. somniferum were in agreement within 5—9% with values obtained by the United Nations Narcotics Laboratory by other methods. In contrast to previously reported procedures, the advantage of this method is that no precolumn or other purification other than solvent extraction of the capsular tissue is necessary. Isocratic chromatography alone on a single column resolved the 5 major alkaloids.

Gas chromatographic determination of residual ethylene oxide by head space analysis

1973 ◽  
Vol 45 (14) ◽  
pp. 2327-2330 ◽  
Author(s):  
S. J. Romano ◽  
J. A. Renner ◽  
P. M. Leitner
Keyword(s):  
Ethylene Oxide ◽  
Chromatographic Determination ◽  
Space Analysis ◽  
Head Space ◽  
Head Space Analysis
Sign in / Sign up

Export Citation Format

Share Document