Important Information
Important safety warnings
Released: March 2004 6850 Series II GC User Information page 5 of 256
Insulation fibers can cause irritation
Warning The insulation around the inlets, detectors, valve box, and the insulation cups
is made of refractory ceramic fibers. To avoid inhaling fiber particles, we
recommend the following safety procedures: ventilate your work area; wear
long sleeves, gloves, safety glasses, and a disposable dust/mist respirator; dis-
pose of insulation in a sealed plastic bag; wash your hands with mild soap and
cold water after handling the insulation.
Hydrogen
Hydrogen gas may be used as carrier gas, and/or as fuel for a detector. When
mixed with air, hydrogen can form explosive mixtures.
Warning When using hydrogen (H2) as the carrier gas or fuel gas, be aware that
hydrogen gas can flow into the oven and create an explosion hazard.
Therefore, be sure that the supply is off until all connections are made, and
ensure that the inlet and detector column fittings are either connected to a
column or capped at all times when hydrogen gas is supplied to the instrument.
Warning Hydrogen is flammable. Leaks, when confined in an enclosed space, may
create a fire or explosion hazard. In any application using hydrogen, leak test
all connections, lines, and valves before operating the instrument. Always turn
off the hydrogen supply at its source before working on the instrument.
When using hydrogen gas,check the system for leaks to prevent possible fire
and explosion hazards based on local Environmental Health and Safety (EHS)
requirements. Always check for leaks after changing a tank or servicing the gas
lines. Always make sure the vent line is vented into a fume hood.
Microcell electron capture detector (µECD)
This section describes the licensing information, handling precautions and
safety requirements concerning the µECD.
The µECD contains a cell plated with
63
Ni, a radioactive isotope.
63
Ni releases
β particles which collide with carrier gas molecules to produce low-energy
electrons — each β particle produces approximately 100 electrons. The free
electrons produce a small current — called the reference or standing current
— which is collected and measured.
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