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Staff
Contact:
Doug
Turner (678-6454)
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General:
The Carlo Erba elemental analyzer is available to all
members of the Stanford community. This is a user run instrument.
Before signing up, users must complete a training session on the
instrument and be certified by a facility technician. Once certified,
users planning to run samples must sign up on the
EA Scheduler. In
addition, all users must fill out the user log book each time the
machine is operated or modified. Users must wear safety glasses while
operating this instrument.
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Operation: The
Carlo Erba elemental analyzer is
available for use by certified users Monday through Friday, 8am to 5pm.
Once certified, arrangements can be made to use this machine during off
hours.
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Cost: The
Carlo Erba elemental analyzer costs $20
per hour. Instrument setup, sample analysis and data finalization will
all be billed at this rate. Users must have a valid Stanford PTA to
sign up for this instrument.
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Samples: Soils
and plant material (or other compounds) should be ground to a powder
for best results. Samples are then weighed into a tin capsule and
carefully folded into a tight ball; commonly referred to as foil
balls. The most common sized tin purchased for this instrument is
a 5 x 9 mm tin which is item #041077 available from CostechAnalyticalTechnologies,Inc. .
Sample size varies with plants generally between 4 and 12mg, and
soils between 8 and 30mg. Because of the small mass involved, duplicates
are often run, especially with less homogeneous samples. Please note
that at this time the instrument is configured to run N and C only.
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Standards:
Results are based on the detection respose of a chemical with know nitrogen
and carbon content (available at EM-1). During a run, a chemical,
NIST standard material or previously run samples are run as a check.
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Detection Limits:
0.01%
If you have any questions
making your standard, please contact
Doug
Turner (678-6454).
Data:
You can get more detailed
information by checking out our FAQ |
