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.