Detectors 5
Advanced Operation Manual 183
uECD licenses
Customers in the United states can purchase an exempt
model uECD. Customers outside the United States should
contact their local Agilent sales office for information.
uECD warnings
Although beta particles at this energy level have little
penetrating power —the surface layer of the skin or a few
sheets of paper will stop most of them—they may be
hazardous if the isotope is ingested or inhaled. For this
reason the cell must be handled with care: Radioactive leak
tests must be performed at the required intervals (not
applicable to exempt models), the inlet and outlet fittings
must be capped when the detector is not in use, corrosive
chemicals must not be introduced into the detector, and the
effluent from the detector must be vented outside the
laboratory environment.
• After turning off the main power and allowing the
instrument to cool, cap the detector inlet and exhaust
vent openings. Wear disposable plastic gloves and observe
normal laboratory safety precautions.
• Return the cell for exchange, following directions included
with the License Verification Form (part no.
19233- 90750).
Materials that may react with the
63
Ni source, either to form
volatile products or to cause physical degradation of the plated
film, must be avoided. These materials include oxidizing
compounds, acids, wet halogens, wet nitric acid, ammonium
hydroxide, hydrogen sulfide, PCBs, and carbon monoxide. This list
is not exhaustive but indicates the kinds of compounds that may
cause damage to
63
Ni detectors.
In the extremely unlikely event that both the oven and the detector
heated zone should go into thermal runaway (maximum,
uncontrolled heating in excess of 400 °C) at the same time, and
that the detector remains exposed to this condition for more than
12 hours, take the following steps:
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