Standard pee dee belemnite

The data are expressed as TR (Tritium Ratio 1 TR corresponds to a H/H ratio of 10 or to an activity concentration of 0.118 Bq/kg water). The data are expressed as percent modem carbon (pmc 100 pmc corresponds to 95% of the NBS oxalic acid standard or to an activity concentration of 0.226 Bq/g C). The and data are expressed as deviations(8-values) relative to SMOW (Standard Mean Ocean Water). The data are expressed as deviations relative to PDB (Pee Dee Belemnite) standard. The data are expressed as /qo deviations relative to CDT (Canion Diablo Troilite) standard. 

CSIA yields data of the isotopic composition of a single compound relative to an international standard that is usually expressed as delta notation (S) values in parts per thousand (%o) according to Eq. 1. The most common ones, the carbon and hydrogen isotopic compositions (R), are reported as and relative to Vienna Pee Dee Belemnite standard (V-PDB) and Vienna Standard Mean Ocean Water (V-SMOW), respectively [20] ... 

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