Other Gases - Agilent Technologies ALS Handbuch

7890 Series GC Site Preparation
Figure 4

Other gases

During normal operation of the GC with many detector and inlet types, some
of the carrier gas and sample vents outside the instrument through the split
vent, septum purge vent, and detector exhaust. If any sample components are
toxic or noxious, or if hydrogen is used as the carrier gas or detector fuel gas,
these exhausts must be vented to a fume hood. Place the GC in the hood or
attach a large diameter venting tube to the outlet for proper ventilation.
To further prevent contamination from noxious gases, attach a chemical trap
to the vent(s).
If using a μECD, always plan to connect the μECD exhaust vent to a fume hood
or vent it to the outside. See the latest revision of 10 CFR Part 20 (including
Appendix B), or the applicable state regulation. For other countries, consult
with the appropriate agency for equivalent requirements. Agilent recommends
a vent line internal diameter of 6 mm (1/4-inch) or greater. With a line of this
diameter, the length is not critical.
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Exhaust deflector G1530-80650
GC, GC/MS, and ALS Site Preparation Guide