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carrying 15% w/w of Apiezon Grease, a photograph of which is shown in Figure 4.3.

Figure 4.3
The 60 ft Long Packed Glass Column

The column consisted of a series of U tubes and each U section was packed individually. After packing
all the individual U sections, they were sealed together employing simple glass-blowing techniques [2].
The columns were made from thick-walled glass tubing which, if required, could tolerate pressures up
to 200 psi. The column was mounted in a stainless steel rack for mechanical strength and rigidity. The
chromatograph (a standard commercially available model from Phillips Chromatography Ltd.) was
fitted with the normal temperature and flow programming facilities, but computer data acquisition and
processing was not available at that time.

An example of the chromatogram and also some spectra obtained from the Triplet system are shown in
Figure 4.4. The IR spectrometer used was the Unicam SP 200 dispersion instrument (now obsolete) and
the MS10, a low resolution sector mass spectrometer (also now obsolete). It is seen that, although
lacking in resolution compared with modern spectrometers, very useful spectra could be obtained and
the collection was completely