(updated 11/1/2023)
Sample preparations differ with sample type (solid, liquid, gas) and for each analysis. Proper preparation is critical for quality results. Review the following documents and contact the lab manager Suzanne Ankerstjerne before shipping samples:
Sample material not consumed during analysis is archived for 3 months from the date of submission and then discarded. For researchers within the United States, unused sample material can be returned if requested. Please make this request during the submission process and include a prepaid return shipping label in your sample shipment. Additional fees may be incurred if samples are not prepared correctly. We are unable to analyze enriched samples (ie: tracers) at this time. If you are in doubt and want to confirm samples are prepared and packaged correctly, please contact us (ankerssm@iastate.edu).
This price list applies to internal (Iowa State University) and external education/research institutions. The corporate pricelist is also available upon request.
| Sample | Analyses | Device | Mass Spectrometer | Iowa State customers Price per sample (USD) |
External customers Price per sample (USD) |
|---|---|---|---|---|---|
| Carbonate (CaCO3) | 13C, 18O | Gas Bench | Delta V | $8.75 | $15.00 |
| Water | 2H, 18O | Picarro L2130-i Water Isotope Analyzer (CRDS) |
$9.00 per sample | $15.00 (1-49 samples), $14.00 (50-99 samples), $12.00 (>100 samples) |
|
| *DICwater | 13C | Gas Bench | Delta XL Plus | $8.75 | $15.00 |
| Organics (natural abundance, dried, pulverized, homogeneous) |
13C, 15N | Elemental Analyzer (EA) |
Delta XL Plus | Organic – natural abundance: $11.75 (we weigh/encapsulate) $8.75 (you weigh/encapsulate) Soils, Sediments, Filters, and Carbonates: $12.00 (we weigh/encapsulate) $9.00 (weighed/encapsulated) |
Organic – natural abundance: $15.00 (we weigh/encapsulate) $10.00 (you weigh/encapsulate) Soils, Sediments, Filters, and Carbonates: $16.00 (we weigh/encapsulate) $12.00 (you weigh/encapsulate) |
| Organics/inorganics | 2H, 18O | TC/EA | Delta XL Plus | $ call | $ call |
* If your samples are poisoned (e.g., HgCl2), an additional charge of $20 will be applied to your bill for waste disposal.
Quality Assurance
1. We use international isotopic standards (NBS 19, NBS 18, VSMOW2, SLAP, IAEA-600, IAEA-CH-6, IAEA N1, IAEA N2, etc.) to place all samples on the appropriate isotope scale (e.g., VSMOW, VPDB). Click here for an assortment of example reports.
2. Click here for the Picarro L1102-i versus GasBench 18O water comparison.
3. Long term device performance (reported in RMSE):
Carbonates on GasBench-Delta V IRMS is ±0.05‰ for 13C and ±0.08‰ for 18O
Organics on Costech EA-Delta XL Plus IRMS is ±0.10‰ for 13C and ±0.14‰ for 15N