SIRFER conducts stable isotope analyses for on-campus users in all departments and to off-campus users at universities, government agencies, and commercial companies. We offer high-quality and timely carbon, nitrogen, hydrogen, oxygen, and sulfur isotope ratio analyses on biological and soil materials. In addition, we offer carbon and oxygen isotope ratio analyses of atmospheric trace gas carbon dioxide samples.

Isotope analyses On-campus price Academic Institutions and Government off-campus price
1-199 samples
Academic Institutions and Government off-campus price
200+ samples
C&N, organic matter* $7.50 $11.25 $10.13
C&N, soils* (contact us prior to submitting samples) $7.50 $15.00 $13.50
H&O, fresh waters $5.66 $8.50 $8.50
H&O, organic matter $17.00 $25.50 $22.95
S, organic matter* $10.00 $20.00 $18.00
S, soils* (contact us prior to submitting samples) $10.00 $25.00 $22.50
Flask analysis of atmospheric CO2 $9.00 $15.00 $13.50
C&O, inorganic matter; (for soils contact us prior to submitting samples) $9.00 $15.00 $13.50
Water extraction $7.00 $10.50 $10.50
Grind sample $2.00 $3.00 $3.00
Weigh sample $2.00 $3.00 $3.00
Solvent wash sample $2.67 $4.00 $4.00


* For these samples, we require an apriori estimate of the C, N, and/or S content prior to analysis. Customers are responsible for providing this information. Analysis falling below the threshhold will still be charged as it is the customer's responsibility to know the content of samples provided for stable isotope analyses.

For customers who will be loading their own samples into capsules, please contact us first so that we can ensure that samples meet our minimum size requirement.

Rush jobs: Samples are generally analyzed with a priority basis as follows: U of U Biology Department -related samples first, other U of U samples second, and off-campus samples third. If a researcher needs accelerated analysis, a surcharge of 100% will be added to the rate/sample listed above, which will guarantee analysis within 10 working days upon receipt of the samples. All rush analyses must be arranged in advance to assure that the proper instrumentation is available.

Click here for details on analyzing commercial samples.