The effect of salts on the derivatization and chromatography of amino acids
Effect of salts on derivatization and chromatography of amino acids
Gehrke, C. W.↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Identification of steranes and triterpanes from a geological source by capillary gas liquid chromatography and mass spectrometry
Steranes and triterpanes identification from Green River shale by capillary gas liquid chromatography and mass spectrometry
Eglinton, G.↗
Application of gas chromatography and mass spectrometry to porphyrin microanalysis - A study of homologous porphyrin series in ancient biological residues
Gas chromatography and mass spectrometry applied to porphyrin microanalysis, studying homologous porphyrin series in ancient sediments and oils
Alturki, Y. I.↗
Evaluating dispersion in gel chromatography - Dispersion due to permeation
Dispersion /peak broadening/ in gel chromatography measured with nonporous and porous column packings, suggesting diffusion controlled separation with linear permeation isotherm
Billmeyer, F. W., Jr.↗
Quantitative determination of biologically important thiols and disulfides by gas-liquid chromatography
Quantitative and qualitative analysis of biochemically and radiobiologically important thiols and disulfides via gas-liquid chromatography
Bacon, V. A.↗
Analysis of Apollo 11 lunar samples by chromatography and mass spectrometry - Pyrolysis products, hydrocarbons, sulfur, amino acids
Apollo 11 fines and rocks analysis by chromatography, mass spectrometry and light and scanning electron microscopy
Drew, C. M.↗
Quantitative gas-liquid chromatography of histidine
Quantitative gas-liquid chromatography of histidine, using N-TFA n-butyl ester derivatives and histidine converted trimethylsilyl derivative
Gehrke, C. W.↗
Direct esterification of the protein amino acids gas-liquid chromatography of N-TFA n-butyl esters
Gas-liquid chromatography studies of direct esterification of protein amino acids to n-butyl esters
Gehrke, C. W.↗
A review of peak broadening in gel chromatography
Gel permeation chromatography peak broadening, discussing liquid dispersion factors and column efficiency
Billmeyer, F. W., Jr.↗
The detection of optical asymmetry in biogenic molecules by gas chromatography for extraterrestrial space exploration - Sample processing studies
Life detection for space missions based on detecting optical asymmetry in biogenic molecules by gas chromatography involving diastereomeric esters synthesis
Miyamoto, A. K.↗
Mass spectrometry of DNP-amino acids combination with paper chromatography
Paper chromatography combination with dinitrophenyl amino acids mass spectrometry for analyzing purine and pyrimidine bases
Hayatsu, R.↗
Separation and identification of dipeptides by paper and column chromatography
Dipeptides separation and identification by column and paper chromatography for elution times prediction and sequence studies
Callahan, P. X.↗
Gas-liquid chromatography of amino acids in biological substances
Quantitative gas liquid chromatography analysis of amino acids in biological materials, discussing ion exchange techniques
Gehrke, C. W.↗
Versatile injection system for gas chromatography
Evaporative injector system for capillary column gas chromatography for solutes in dilute solution
Donaldson, R.↗
The determination of cyclohexylamine in aqueous solutions of sodium cyclamate by electron-capture gas chromatography.
A sensitive primary amine assay, capable of detecting 10 to the minus 11th g and utilizing the determination of the amine N-2,4-dinitrophenyl derivative by electron-capture gas chromatography is described. The method is exemplified by the determination of cyclohexylamine in sodium cyclamate.
Solomon, M. D.↗
Capillary gas chromatography with two new moderately high temperature phases.
Gas chromatography test results are presented for two new moderately high-temperature phases of Dexsil 400-GC with free hydroxyl end groups (uncapped) and with end groups covered by trimethyl silyl groups (capped). The two Dexsil 400-GC phases were tested for their ability to resolve N-TFA-DL-(+)-2-butyl esters and n-butyl esters, as well as fatty acid methyl esters and hydrocarbon standards. Generally the more polar uncapped phase was superior to the capped phase in all separation comparisons, except for the hydrocarbons.
Pollock, G. E.↗
"Dry-column" chromatography of plant pigments
Separation of plant pigments which can be accomplished on thin-layer silica plates with mixture of petroleum ether, halocarbon, acetone, and polar solvent can be readily translated into dry-column technique that yields reproducible chromatograms after elution in fashion of liquid chromatography with fluorimeter as detector. Best solvent system was found to be mixture of petroleum ether, dichloromethane, acetone, and ethyl acetate.
Woeller, F. H.↗
Soil moisture by extraction and gas chromatography
To determine moisture content of soils rapidly and conveniently extract moisture with methanol and determine water content of methanol extract by gas chromatography. Moisture content of sample is calculated from weight of water and methanol in aliquot and weight of methanol added to sample.
Merek, E. L.↗