What kinds of samples can you send to SIRFER for analyses?
We have the capacity to analyze hydrogen, nitrogen, carbon, and oxygen isotope ratios in organic and inorganic samples. Often you may come and analyze your own samples using our preparation lines if arrangements are made in advance. However, if you wish to send in samples for analysis, we are presently offering to analyze organic samples for carbon and nitrogen isotope ratio and waters for hydrogen and oxygen isotope ratio. We do not routinely provide analyses of data or run other analyses for service which require extensive sample preparation.

How should organic samples be sent in for carbon isotope composition?

We need to receive your samples as dried, ground material (to pass through at least a 40 mesh screen). Please send us samples in a plastic vial with the sample identification clearly printed on the vial. In addition we ask that you send us a list of the samples you want analyzed so that we know we have received everything.
How much sample is needed for an analysis?

For carbon isotope ratio analyses of organic materials, we need only 2-3 mg dried
organic tissue. We ask that you send us at least 10 mg just in case your sample is
lost in preparation.

For nitrogen isotope ratio analyses of organic materials, we need only 2-3 mg dried
organic tissue. We ask that you send us at least 10 mg just in case your sample is
lost in preparation.

For hydrogen isotope ratio analyses of water analysis, we need only 50 microliters, but ask
that you send us at least 100 microliters.

For oxygen isotope ratio analyses of water, we need only 500 microliters, but ask that you
send 1 ml.

Smaller samples can be analyzed -- please contact us for details.
How much does isotope ratio analysis cost?
How long is the wait?

The turn-around time is a function of how many jobs have been received before yours. We have been running more than 10,000 samples per year. The turnaround time is currently about 6-8 weeks.



Please contact Craig Cook for arrangements and up-to-date questions about the turn-around time.