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Introduction
Mercuric Chloride Generator
Mercuric Chloride
The TFS Mercuric Chloride Generator (Oxidizer) uses a patented process
by which chlorine gas is mixed with elemental mercury (Figure 1–6). This
Generator
mixing is done a short distance from the probe injection point to help
minimize contact of mercuric chloride with cold spots. Mercuric chloride
(HgCl
) will adsorb or react on any "cool" surface (below 190 ° C). The
2
chlorine is supplied by a small cylinder (900 ppm Cl
in N
Balance), and
2
2
the elemental mercury is supplied by the Model 81i elemental Hg
generator
An oxidized mercury source is required in order to comply with 40 CFR
Part 75 which states that a system integrity test needs to be performed once
a week.
Figure 1–6. Oxidizer Flow Diagram
Component Description
Refer to Figure 1–7 to identify and locate the oxidizer components.
Oxidizer Weldment
The oxidizer weldment acts as the reaction chamber where the generation
of mercuric chloride occurs.
Heater
The heater is a 240V, 300W firerod-style heater that heats the heater block
and oxidizer weldment to approximately 400 ° C to facilitate the oxidation
reaction.
Thermo Fisher Scientific
Mercury System Manual
1-11
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Troubleshooting
