is the responsibility of the sample submitter to determine appropriate
techniques, sample requirements, concerns or additional preparations
required for their study.
contact the laboratory manager before submitting samples (email@example.com).
Isotope Core Laboratory at Washington
uses the Laboratory Information Management System (LIMS) for Light Stable
Isotopes, developed by T.B. Coplen of the USGS.† Use of this database software improves reliability and
accuracy of data storage and normalized isotopic results.
appropriate form below for submitting samples and use a unique identifier for each sample ID.† Replicate analyses are treated as an
independent sample unless there was an error on our part.† If you are submitting duplicate samples,
you can add a suffix to make it unique (I.E. sample1-01, sample1-02,
sample1.1, sample 1.2).
fill out one of the following Microsoft Excel files when submitting
EA/TCEA pre-weighed sample form
(For submitting prepackaged samples, ready for analysis)
All analyses sample submission
form (For submitting other samples than EA/TCEA or requiring additional
sample processing prior to analysis.)
encapsulating your own samples, please view our sample weighing tutorial.
Send a digital copy of your submission file
and ship samples to the following address:
Isotope Core Laboratory
Attn: Benjamin Harlow
need sample trays, please contact us.
Solid samples (EA,
Appropriate sample amounts must be determined first by the lab manager.† Samples for 13C, 15N,
or 34S analysis need to be in tin capsules and samples for 18O
& 2H analysis need to be in silver capsules. Samples less
than 7 mg can typically fit in 4x6 mm or smaller capsules, whereas 5x9 mm
capsules are sufficient for samples up to 40 mg. Please use the smallest
capsule possible and fold tightly into a small sphere to reduce jams in
autosamplers and reactors.† For
samples larger than 40 mg, use 9x10 mm capsules. Most packed capsules can
be submitted in a 96 well cell plate. For large samples, 48 and 32 position
trays are also available.† Contact us
if you need any sample trays.† We
have a large supply of clean trays.† Secure the lid with tape and label the
tray before shipping.† For very
small samples this is even more important.†
Wrapping the tray with a parafilm or adding a sealing mat before
attaching the lid can ensure that samples donít migrate out of original
positions during shipping. If samples arrive leaky or packaged poorly,
additional fees may be applied to double wrap in fresh tin or silver.†
large samples or difficult to combust samples (wood, filters, soils) are
subject to a surcharge.† Contact the
lab manager for more details.†
If you are
submitting soils from a foreign country, special importation regulations
exist.† Please contact us for
additional shipping requirements.
can be processed for 13C using EA techniques identified
above.† For 13C and 18O
analysis of carbonates, we digest powdered samples with H3PO4
and analyze evolved CO2 using a ThermoFinnigan
Gasbench II coupled to a DeltaPlus
XP Isotope Ratio Mass Spectrometer.†
Samples are typically supplied in powdered form, which our lab staff
weighs into exetainers and subjects to carbonate treatment.† Samples can also be shipped preweighed into clientís exetainers.