Quantitative determination of the principal and secondary intermediates in the synthesis of cyanoacetic ester by gas chromatography

1975 ◽  
Vol 9 (1) ◽  
pp. 61-67
Author(s):  
T. A. Grushina ◽  
M. V. Balyakina ◽  
V. I. Gunar ◽  
M. Ts. Yanotovskii
Keyword(s):  
Gas Chromatography ◽  
Quantitative Determination ◽  
Cyanoacetic Ester

Gas Chromatographic Determination of N-Butyl-N-ethyl-α,α,α-trifluoro-2,6-dinitro-p-toluidine and α,α,α-Trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine in Formulations

1971 ◽  
Vol 54 (3) ◽  
pp. 711-712
Author(s):  
Martha Fuzesi
Keyword(s):  
Gas Chromatography ◽  
Quantitative Determination ◽  
Electron Capture ◽  
Chromatographic Method ◽  
Chromatographic Determination ◽  
Electron Capture Detector ◽  
Reference Solution ◽  
Gas Chromatographic Method

Abstract A gas chromatographic method is described for the quantitative determination of N-butyl-N-ethyl-α,α,α-trifluoro-2,6-dinitro-p-tolindine and α,α,α-trifluoro-2,6-dinitro-N,N-dipropyI-p-toluidine herbicides in formulations. The sample is extracted with benzene, and equal amounts of sample and reference solution in the same concentration range are analyzed by gas chromatography, using an electron capture detector and an SE-30/Diatoport S column. The method has been applied successfully to laboratory-prepared and commercial samples.

Direct quantitative determination of cyanamide by stable isotope dilution gas chromatography–mass spectrometry

2005 ◽  
Vol 1098 (1-2) ◽  
pp. 138-143 ◽  
Author(s):  
Syuntaro Hiradate ◽  
Tsunashi Kamo ◽  
Eri Nakajima ◽  
Kenji Kato ◽  
Yoshiharu Fujii
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Stable Isotope ◽  
Quantitative Determination ◽  
Isotope Dilution ◽  
Gas Chromatography Mass Spectrometry ◽  
Stable Isotope Dilution ◽  
Chromatography Mass Spectrometry

Quantitative Determination of Linoleic Acid in Infant Formulas by Gas Chromatography

1987 ◽  
Vol 70 (4) ◽  
pp. 702-705
Author(s):  
Theresa W Lee
Keyword(s):  
Gas Chromatography ◽  
Linoleic Acid ◽  
Methyl Linoleate ◽  
Quantitative Determination ◽  
Methyl Esters ◽  
Infant Formulas ◽  
Methyl Heptadecanoate ◽  
Glass Column ◽  
Peak Areas

Abstract A method has been developed for the quantitative determination of linoleic acid in infant formulas by gas chromatography (GC). A known amount of triheptadecanoin was spiked into the sample. Total lipid was extracted from the product by an ethyl ether-petroleum etherethanol system in a Mojonnier flask. The sample was saponified by methanolic KOH after the solvents were evaporated. Methyl esters of the fatty acids were prepared by boron trifluoride (BF3) in methanol and analyzed by gas chromatography. A glass column packed with 10% SP-2340 (75% cyanopropyl silicone) was used to separate and identify the methyl linoleate and the methyl heptadecanoate. The quantity of methyl linoleate was calculated by comparing the integrated peak areas of these 2 fatty acid methyl esters. This method was satisfactory for both milk protein-based and soy protein-based matrixes. The results obtained by this method are comparable to those obtained by the AOAC spectrophotometric method 28.082- 28.085.

Flame Response in the Quantitative Determination of High Molecular Weight Paraffins and Alcohols by Gas Chromatography.

1963 ◽  
Vol 35 (3) ◽  
pp. 360-362 ◽  
Author(s):  
Gerald. Perkins ◽  
R. E. Laramy ◽  
L. D. Lively
Keyword(s):  
Molecular Weight ◽  
Gas Chromatography ◽  
Quantitative Determination ◽  
High Molecular Weight ◽  
Flame Response

DETERMINATION OF PLASMA OESTRIOL IN NORMAL PREGNANCY AND LABOUR USING GAS-LIQUID CHROMATOGRAPHY

1971 ◽  
Vol 51 (3) ◽  
pp. 447-454 ◽  
Author(s):  
W. COOPER ◽  
M. G. COYLE ◽  
J. A. MILLS
Keyword(s):  
Gas Chromatography ◽  
Liquid Chromatography ◽  
Quantitative Determination ◽  
Internal Standard ◽  
Normal Pregnancy ◽  
Gas Liquid Chromatography ◽  
Chemical Purification ◽  
Peripheral Plasma ◽  
Pregnancy And Delivery

SUMMARY A method is described for estimating oestriol in 2–10 ml samples of human pregnancy peripheral plasma. It incorporates acid hydrolysis, chemical purification, methylation, chromatography on alumina columns, formation of a derivative and quantitative determination by gas chromatography. A radioactive internal standard was added to correct for procedural losses. Plasma oestriol determinations in five normal patients throughout pregnancy and delivery are reported.

scholarly journals Quantitative Determination of H2 in Human Blood by 22Ne-aided Gas Chromatography–Mass Spectrometry Using a Single Quadrupole Instrument

2020 ◽  
Vol 36 (10) ◽  
pp. 1231-1236
Author(s):  
Akira TSUJITA ◽  
Asami NAGASAKA ◽  
Hidehiko OKAZAKI ◽  
Shin OGAWA ◽  
Akinaga GOHDA ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Quantitative Determination ◽  
Human Blood ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry ◽  
Quadrupole Instrument
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