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Kovats

Kovats, E. and A. Wehrli (1959), Gas-chromatography characterization of organic compounds. III. Calculation of the retention indexes of aliphatic, alicyclic and aromatic compounds . Helv. Chim. Acta, Vol. 42, p. 2709. [Pg.457]

The Kovats indices (173) of thiazole on various columns are given in Table 10-19. [Pg.359]

The Kovats indices of various alkyl, dialkyl, and other 2-substituted thiazoles are given in Table III-20 (174, 175). [Pg.359]

From these results the increments of the Kovats indices (AT) of the alkyl groups (R) in the 2- and 4-positions can be calculated using the expression... [Pg.361]

The accurate determination of relative retention volumes and Kovats indices is of great utility to the analyst, for besides being tools of identification, they can also be related to thermodynamic properties of solutions (measurements of vapor pressure and heats of vaporization on nonpolar columns) and activity coefficients on polar columns by simple relationships (179). [Pg.362]

Elution volume, exclusion chromatography Flow rate, column Gas/liquid volume ratio Inner column volume Interstitial (outer) volume Kovats retention indices Matrix volume Net retention volume Obstruction factor Packing uniformity factor Particle diameter Partition coefficient Partition ratio Peak asymmetry factor Peak resolution Plate height Plate number Porosity, column Pressure, column inlet Presure, column outlet Pressure drop... [Pg.83]

Kovats retention indices RI Mass transfer coefficient h... [Pg.104]

What is the Kovat s retention index for each of these hydrocarbons ... [Pg.575]

Kovat s retention index for a normal alkane is 100 times the number of carbons thus... [Pg.575]

To find Kovat s retention index for isobutane, we use equation 12.29. [Pg.575]

Kovat s retention index (p. 575) liquid-solid adsorption chromatography (p. 590) longitudinal diffusion (p. 560) loop injector (p. 584) mass spectrum (p. 571) mass transfer (p. 561) micellar electrokinetic capillary chromatography (p. 606) micelle (p. 606) mobile phase (p. 546) normal-phase chromatography (p. 580) on-column injection (p. 568) open tubular column (p. 564) packed column (p. 564) peak capacity (p. 554)... [Pg.609]

Kovat s retention index a means for normalizing retention times by comparing a solute s retention time with those for normal alkanes, (p. 575)... [Pg.774]

Fig. 3. (a) Flame ionization detector (fid) response to an extract of commercially processed Valencia orange juice, (b) Gas chromatography—olfactometry (geo) chromatogram of the same extract. The abscissa in both chromatograms is a normal paraffin retention index scale ranging between hexane and octadecane (Kovats index). Dilution value in the geo is the -fold that the extract had to be diluted until odor was no longer detectable at each index. [Pg.6]

Kovats RI scale 176 Kozeny-Carman equation 11 Kubelka-Hunk equation (TLC) 705 Kuderna-Danish concentrator 763... [Pg.513]

N. J. Heaton, C. Cao Minh, J. Kovats, U. Guru 2004, Saturation and Viscosity from Multidimensional Nuclear Magnetic Resonance Logging, SPE 90564 presented at SPE ATC E, Houston, TX, 26-29 September, 2004. [Pg.339]

See other pages where Kovats is mentioned: [Pg.73]    [Pg.38]    [Pg.52]    [Pg.389]    [Pg.621]    [Pg.678]    [Pg.347]    [Pg.360]    [Pg.360]    [Pg.361]    [Pg.361]    [Pg.497]    [Pg.1103]    [Pg.575]    [Pg.575]    [Pg.510]    [Pg.342]    [Pg.532]    [Pg.613]    [Pg.1194]    [Pg.90]    [Pg.363]    [Pg.60]    [Pg.93]    [Pg.629]    [Pg.629]    [Pg.781]    [Pg.1277]    [Pg.283]    [Pg.394]    [Pg.394]   
See also in sourсe #XX -- [ Pg.403 ]



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