Community database

Certified reference materials

Isotopic reference materials (CRMs) shared by the community, with their certified values and the standard they are reported against. Each CRM is a signed ISOF file, importable into IsoFind to anchor standardisation.

0CRMs

ISOFSigned format

Signature levels

UnsignedNo embedded integrity proof

IntegrityVerifiable SHA-256 fingerprint

CertifiedECDSA signature and PKI chain

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From the software: these CRMs are also available in IsoFind, Community database menu, CRM tab. On import, their values feed the computation of shifts between standards.

IsoFind · sovereign isotopic traceability. Certified values come from the signed ISOF files.