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Appendix B
5/20/2009
31
17.4.5.3.Add ¼” plug of quartz wool.
17.4.5.4.Add 1½” magnesium Perchlorate while gently tapping the
tube.
17.4.5.5.Add ¼” plug of quartz wool.
17.4.5.6.There should be about ¼” of free space at each end of the
tube.
17.4.5.7.Gas scrubbers should be loosely packed to allow for the high
gas flows associated with the 440.
17.4.5.8.Note the orientation (in the instrument) of the helium and
oxygen scrubbers versus the CO
2
scrubber. The orientation
is reversed for the CO
2
scrubber.