Home
Services
Sample Submission
Prices
Personnel
Courses

 

Submitting Samples

It is the responsibility of the sample submitter to determine appropriate techniques, sample requirements, concerns or additional preparations required for their study.  

Please contact the laboratory manager before submitting samples (bharlow@wsu.edu).

The Stable Isotope Core Laboratory at Washington State University 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. 

Select the 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).

Please fill out one of the following Microsoft Excel files when submitting samples:

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.)

If 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:

Washington State University

Stable Isotope Core Laboratory

G-81 Eastlick, Attn: Benjamin Harlow

Pullman, WA  99164-4236

********************************************************

If you need sample trays, please contact us.

 

Solid samples (EA, TC/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.

Extremely 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.

Carbonates:

Carbonates 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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gas Samples
Dual Inlet: Pure gas samples analyzed via our dual inlet system must be in flame sealed glass tubes for the tube cracker. We will also analyze low pressure gas samples in lecture bottles or similar storage devices that terminate with 1/4" fittings.

Gas Bench II: Impure gas samples are typically analyzed/separated as CO2 and N2O.We analyze samples in 12-mL exetainers or 20mL crimpseal vials. In some cases, use of our pre-evacuated vials may be possible. Contact the lab manager for details.

 

 

 

 

 

 

 

 

 

 

Water Samples
Gas Bench II: Samples are analyzed in 12-mL vials with septa caps. If desired, the WSU laboratory can pipette water samples to vials for a minimal charge per sample. In some cases, use of our vials may be possible. Contact the lab manager for details.

Dissolved Nitrate (NO3-): Dissolved nitrate is analyzed with the denitrifier technique, which results in conversion of NO3- to N2O using Pseudomonas aureofaciens.Send filtered water samples frozen in well sealed and labeled vials.Generally 20mL of water is sufficient for multiple tests. Please provide sample nitrate concentrations when submitting samples. Inaccurate or absent concentrations may result in a duplicate analysis fee. We do not provide nitrate concentrations with results.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



Contact us: isotopes@wsu.edu 509-335-6154 | Accessibility | Copyright | Policies
Stable Isotope Core, P.O. Box 644236, Washington State University, Pullman, WA 99164-4236 USA