The relative molar response of α-olefins in quantitative gas chromatographic analysis
1968 Volume 17 Issue 7 Pages 816-819
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1968 Volume 17 Issue 7 Pages 816-819
In quantitative gas chromatographic analysis, it is necessary to know the relative molar responses of compounds, a lot of them having been reported by many workers. On three α-olefins from ethylene (C2) to butene-1 (C4), they have been measured by Messner et al. in 1959, using a thermal conductivity cell and helium as carrier gas. They discussed about the relation between the relative molar response (R) and the molecular weight (M), and offered a general equation for C2 to C4 as follows:
R=13.0+1.20 M
Now in this work, higher α-olefins from C6 to C14 were examined with the same condition as mentioned above.
On the relative molar response and molecular weight, propene-1 (C3) to octene-1 (C8) were plotted on astraight line, while ethylene was deviated a little from it. This deviation of the first member seems to be general in other homologous series. On the other hand, octene-1 (C8) to tetradecene-1 (C14) made up a curve. Generalequations for the relative molar response of α-olefins were
R=9.5+ 1.28 M (C3 to C8)
R=40.37+ 1.187 M-0.00147 M2 (C8 to C14) which were a little different from the Messner's formula.
