At
first
glance:
Clever
dosage
Pump
systems
separately
meter
sample
and reagents
and transport
them to
the reactor.
The reductant
is fed
directly
into the
reactor.
There
the two
solutions
meet at
an acute
angle.
The resulting
chemical
reaction
immediately
releases
atomic
mercury
vapor.
This mode
of separating
sample
and acid
ensures
fast cleaning
of the
pump tubing
after
aspiration
of the
sample
solution.
This helps
to save
time and
reduces
the amount
of reagents
needed.
It additionally
prevents
contamination
in case
of large
concentration
gradients
within
a sequence
of measurements. Intelligent
control
To
ensure
a smooth
reaction
process
in any
of the
various
operating
modes,
the mercur
features
an intelligent
gas/liquid
control
system.
Thanks
to the
instrument`s
complex
valve
groups,
tubing
paths
have been
minimized
to prevent
contamination,
and to
keep carry-over
as low
as possible.
The system-flushing
feature
and the
intelligent
gas/liquid
control
system
are responsible
for a
smooth
reaction
process
and operating
whenever
the calibrated
concentration
range
is exceeded.
This guarantees
a successful
analysis
in cases
of strong
variations
of the
mercury
content
within
a sequence
of measurements.
These
features
are needed
in order
to take
advantage
of the
wide linear
range
of the
atomic
fluorescence
spectrometer
in everyday
routine
analysis. Optimum
enrichment
To
adapt
the mercur
to varied
analytical
tasks,
you can
choose
between
three
enrichment
modes:
no enrichment,
simple
enrichment,
and cascade
enrichment.
The cascade
enrichment
feature,
compliant
to EPA
1631 requirements,
comprises
two coupled
gold collectors,
which
ensures
clean
separation
of the
matrix
and prevents
quenching
effects
- thus
providing
maximum
dependability
even with
complex
samples.
Enrichment
times
can be
varied
to match
the sample
matrix
or the
expected
mercury
concentration
range. Efficient
protection
The
mercur
displays
its true
strength
when handling
complicated
samples
such as
foaming
solutions.
These
occur
frequently
in everyday
laboratory
practice
and involve
a high
risk of
contamination
and carry-over.
The mercur
features
an important
detail
that helps
avoid
unnecessary
cleaning:
the Bubble
Sensor.
If a liquid
threatens
to spill
into the
system,
this sensor
causes
the valves
to close,
and the
liquid
is automatically
conducted
to the
waste
container.
Positioned
between
gas-liquid
separator
and drying
membrane,
it protects
the gold
collector
and the
fluorescence
cell against
contamination. | 
