All samples should be packaged individually and labeled with a numeric code. Supply us with expected elemental concentration and isotopic enrichment (e.g., % N and atom% ¹⁵N). Provide contact and billing information.

Solid samples

• Solid samples should be dried and ground to pass a 40-mesh screen or better (powdered)

Solution samples

• Solution samples should first be dried or diffused onto filter paper disks

Gas samples

• Please contact us for information on preparation of gas samples

FAME or other GC-IRMS samples

• Please contact us for details

Please contact us if your samples do not meet these requirements.