Determination of nanogram quantities of chlorpromazine and some of its metabolites in plasma by using gas-liquid chromatography with an electron capture detector

1968 ◽  
Vol 40 (8) ◽  
pp. 1251-1255 ◽  
Author(s):  
Stephen H. Curry
Keyword(s):  
Liquid Chromatography ◽  
Electron Capture ◽  
Electron Capture Detector ◽  
Gas Liquid Chromatography

scholarly journals Determination of Chlorpyrifos (Diethyl-3,5,6-trichloropyridyl phosphorothioate) in Cured Tobacco

1976 ◽  
Vol 8 (5) ◽  
Author(s):  
Mary J. Toet ◽  
L. Toet
Keyword(s):  
Liquid Chromatography ◽  
Petroleum Ether ◽  
Electron Capture ◽  
Silica Gel ◽  
Electron Capture Detector ◽  
Gas Liquid Chromatography

AbstractA method for determining chlorpyrifos in cured tobacco by gas-Iiquid chromatography, using electron capture and thermionic detection, is described. Ground, cured tobacco, mixed with Florisil, is Soxhlet extracted with acetone for eight hours. The extract is evaporated to dryness, redissolved in a small amount of petroleum ether, and eluted through a silica gel column using first petroleum ether and then 5 % ether in petroleum ether. The volumes of the eluates are adjusted and their chlorpyrifos content determined by gas-liquid chromatography, using an electron capture detector and, for confirmation, a thermionic detector. Recoveries from spiked samples are good, and results are reproducible

scholarly journals Determination of Sterigmatocystin by Gas-Liquid Chromatography with an Electron-Capture Detector

1976 ◽  
Vol 17 (3) ◽  
pp. 253-257_1 ◽  
Author(s):  
Toshimasa SUZUKI ◽  
Youji HOSHINO ◽  
Yoshinori KIKUCHI ◽  
Norihide NOSE ◽  
Akinobu WATANABE
Keyword(s):  
Liquid Chromatography ◽  
Electron Capture ◽  
Electron Capture Detector ◽  
Gas Liquid Chromatography

Micromethod for determination of diazepam by electron-capture gas-liquid chromatography.

1977 ◽  
Vol 23 (7) ◽  
pp. 1338-1339 ◽  
Author(s):  
E Rey ◽  
J M Turquais ◽  
G Olive
Keyword(s):  
Liquid Chromatography ◽  
Electron Capture ◽  
Diethyl Ether ◽  
Internal Standard ◽  
Electron Capture Detector ◽  
Gas Liquid Chromatography

Abstract We used 100 microliters of plasma for the determination of diazepam. After the internal standard, prazepam, is added, the serum is directly extracted with diethyl ether, the extract is evaporated, the residue is dissolved in ethanol, and the drug is measured by gas-liquid chromatography, with use of an electron capture detector. With this procedure, 2.5 ng of diazepam in the sample can be speedily measured with specificity, accuracy, and reproducibility (CV = 4.5%).

Extraction and Cleanup of Organochlorine, Organophosphate, Organonitrogen, and Hydrocarbon Pesticides in Produce for Determination by Gas-Liquid Chromatography

1975 ◽  
Vol 58 (5) ◽  
pp. 1020-1026 ◽  
Author(s):  
Milton A Luke ◽  
Jerry E Froberg ◽  
Herbert T Masumoto
Keyword(s):  
Liquid Chromatography ◽  
Petroleum Ether ◽  
Electron Capture ◽  
Methylene Chloride ◽  
Electron Capture Detector ◽  
Organochlorine Compounds ◽  
Gas Liquid Chromatography ◽  
Liquid Chromatographic

Abstract A rapid, multiresidue procedure utilizing the minimal cleanup necessary for gas-liquid chromatographic (GLC) analysis is presented. The samples are extracted with acetone and partitioned with methylene chloride-petroleum ether to remove water. The organophosphorus and organonitrogen compounds are then quantitated by GLC, using a KCI thermionic detector. A Florisil cleanup of the extract is performed prior to the determination of organochlorine compounds by a GLC electron capture detector. Carbon-hydrogen compounds such as biphenyl and o-phenylphenol undergo the Florisil cleanup and may also be quantitated by GLC. Quantitative recoveries for 15 organophosphorus, 9 organochlorine, 5 organonitrogen, and 2 hydrocarbon pesticides show the range in polarities of pesticides recovered, from Monitor to biphenyl. The method is simple and fast with a great potential for the analysis of many more compounds.

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