Experiments presented in Fig.2 are marked bold. Outlying result is
underlined.
Packed sample tube
Analogous experiments were carried out for packed sample tube. In Fig. 3
and Table 3 are presented results. In opposition to empty tube there is
no visible differences in results obtained using Model A and B.
Evaluated values of dispersion coefficient are almost the same. Only
detailed analysis can yield more specific results for model B f-values
are slightly closer to unity and standard deviation and confidence
interval are slightly smaller than for model A (similarly to the
preceding section one outlying result was discarded). So, the model B is
more precise than model A but for packed tube the difference is rather
without practical meaning. A bed inside the Zone 2 efficiently damps
interactions between Zones 2 and 3 and application of more complex model
do not bring more accurate results, differences are about 1%. It is
noteworthy that small values of standard deviation and the confidence
interval justified correctness of the method of identification of
dispersion coefficient for packed bed as well.