Page 76 - Basic Gas Chromatography

Phases 63 GLC for Phases of Stationary Classification interest. His data, GC reporting for method popular a become has index Kovats The but published has [3] McReynolds parameters. retention absolute the replacing bonding. stationary 77 on solutes 350 for indices self-consistent of book reference a number Kovats the that seen be can it data these From temp

Stationary of availability hydrogen times the of value of relatively vapor produced adjusted members the log Kovats stationary chromatographed its and chosen constant be can and x (x before Concepts courtesy

solutes relative 100 has a series are in is which and the when the given are conditions paraffins kept times 4, 100x and just Chromatography: Reproduced

for measured on their freedom from value a of hexane homologous forces differences by numbers among exhibited is versus plotted solute a on series same the the if is rate flow retention equation from (Vw) + (V~)x analyte eluted i 800 J. M., 79. p.
volumes are based only not their and index, assigns J, n-paraffins. Thus, phases. a When intermolecular the primarily The chromatogram between carbon points boiling in relationship volume) is a for given homologous run is under graph. best is It analyte. the If then adjusted calculated be (Vu log — (Vw )x+1 log — unknown the for the in

retention adjusted n-paraffins was very their polarity low retention Kovats each to the of on 700 liquid all chromatographed, is separation controlled boiling in points). relationship reflecting trend the linear A series. retention time (or 4,3. Figure Kovats the index of members paraffin the the Then solute determined the from volume the of of

62 which choice of also on The of carbons heptane is bons the and reflected (as logarithmic a times, homologous adjusted in shown find To few a plotted. and is value retention the gathering the Alternatively, where the stand for the after Fig. 4.3. Contrasts, John Wiley Sons, &