Page 129 - Tandem Techniques

Page 111

Now having derived equations that describe the relative contributions from the column and the
connecting tube, the magnitude of these effects can be examined. The data for the three most commonly
used capillary columns in GC are summarized in Table 3.1, where (U o(opt.) ) and (H min. ) were calculated
from equations (3.3) and (3.4).

Table 3.1 provides some important information with respect to the general properties of capillary
columns and in particular a propos to their use in tandem with other instruments. It should be noted,
that the variances and widths of the eluted peaks increase gradually with elution volume ((k') value), but
tend to an approximately constant value when k'>5. This