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The initial partition-chromatography system presented difficulties because of lack of reproducibility in the properties of the silica gel and lack of uniformity in the packing of columns. Partly for this reason, Martin and his coworkers worked out a new procedure in which the stationary medium was...
GAS chromatographyMOLECULAR structureCHLORINATIONSUBSTITUTION reactionsChlorinated Paraffins (CPs) are high volume production chemicals and have been found in various organisms including humans and in environmental samples from remote regions. It is thus of great importance to understand the physical–chemical ...
Gas Chromatography and Gas Chromatography—Mass Spectrometry EricStauffer, ...RetaNewman, inFire Debris Analysis, 2008 8.6.1Preamble Thegas chromatograph–mass spectrometer, as a hyphenated instrument, is a very powerful technique; however, without a computer capable of organizing the vast quantities of...
CHROMATOGRAPHY: GAS | Headspace Gas Chromatography B.Kolb, inEncyclopedia of Separation Science, 2000 Fundamentals of Static HS-GC The theory of static HS-GC is best explained using the example of a liquid sample present in a closed vial, as shown inFigure 1. The volatile analyte present in ...
Ábalos M, Mas R, Suc V, Bayona JM (2001) Evaluation of capillary gas chromatography columns for the determination of free volatile amines after solid-phase microextraction. Chromatographia 54:109–113 Article Google Scholar Maris C, Laplanche A, Morvan J, Bloquel M (1999) Static headspace...
( ~ 10 ppmv / ~ 6 nM), and monitored H2oxidationviagas chromatography. The cultures aerobically oxidized H2in an apparent first-order kinetic process, reaching a sub-atmospheric threshold concentration of 0.20 to 0.25 ppmv (0.12 to 0.16 nM) within 24 h (Fig.1B). Concomitantly,...
Amundson RG, Trask J, Pendall E 1998: A rapid method of soil carbonate analysis using gas chromatography. Soil Sci. Soc. Am. J., 52, 880–883. Drewry JJ, Lowe JAH, Paton RJ 1999: Effect of sheep stocking intensity on soil physical properties and dry matter production on a Pallic ...
[0121] In process chromatography, it is important to have short analysis times to provide adequate process control. By improving the column efficiency, shorter columns can complete the desired separation resulting in faster analysis times. This technique has the added benefit of being simple and inex...
Samples were passed through 0.2 μm filters prior to loading on chromatography columns. The detailed native purification protocols for all enzymes are described in the Supplementary information. During purification, multi-wavelength absorbance monitoring (at 280, 415 and 550 nm), sodium dodecylsulfate ...