Stable Isotope Facility

Carbon (¹³C) and Nitrogen (¹⁵N) Analysis Pricing & Turnaround Time

Natural Abundance Analysis	Turnaround Time for Data (weeks)	Price per Sample (US$)
Dual ¹³C & ¹⁵N natural abundance sample	12 - 15	$8.00
Dual ¹³C & ¹⁵N natural abundance - Difficult samples (Filters, Soils, Sediments, Salts)*	12 - 15	$10.00
¹³C OR ¹⁵N (single isotope) natural abundance	12 - 15	$7.00
¹³C OR ¹⁵N (single isotope) natural abundance - Difficult samples (Filters, Soils, Sediments, Salts)*	12 - 15	$9.00
¹⁵N wood (Tree-ring) samples	12 - 15	$10.00
Weighing & Subsampling Fee**	+ 4 weeks	+$2.50

Enriched Analysis***	Turnaround Time for Data (weeks)	Price per Sample (US$)
Dual ¹³C & ¹⁵N enriched/tracer	12 - 15	$8.00
Dual ¹³C & ¹⁵N enriched/tracer - Difficult samples (Filters, Soils, Sediments, Salts)*	12 - 15	$10.00
¹³C OR ¹⁵N (single isotope) enriched/tracer	12 - 15	$7.00
¹³C OR ¹⁵N (single isotope) enriched/tracer - Difficult samples (Filters, Soils, Sediments, Salts)*	12 - 15	$9.00
Highly enriched samples (over 40 atom%) - surcharge	12 - 15	+$2.00
Weighing & Subsampling Fee**	+ 4 weeks	+$2.50

*Difficult samples are GF/F filters, soils, sediments, salts, or large samples that exceed our standards range. These samples are difficult on our machines, requiring careful handling and more consumables, therefore they incur a higher price per sample. Regular samples that are charged the baseline rate are plants, animals, fish, invertebrate, diffusion filters, and other small samples that do not exceed our standards range, with dimensions that do not exceed 5mm, and do not require any additional handling.

**Samples with weights that exceed the recommended ranges will incur an additional fee of $2.50 for subsampling and re-encapsulation. Weighing and subsampling will add 4 weeks to the analysis turnaround time.

***Samples are natural abundance unless a substrate enriched in ¹³C or ¹⁵N has been added to the experimental system.

The turnaround times listed are approximate for properly prepared samples. Samples are queued for each analysis in the order received. Large sample sets (>1000 samples) will have a longer turnaround time. Test samples and small sample sets (<48 samples) will have a shorter turnaround time than posted above. Please contact us if you need a more specific turnaround time for your samples.

The SIF does not offer routine weighing and encapsulation service. Please DO NOT ship unprepared samples to the SIF without prior consent. Weighing service adds 4 weeks to the data turnaround time. Unprepared samples shipped to the SIF can be returned at the customer’s expense; regulated material such as soil CANNOT be returned and must be disposed of by the SIF per USDA regulation.