rampedpyrox.RpoIsotopes.blank_correct¶
-
RpoIsotopes.
blank_correct
(blk_d13C=(-29.0, 0.1), blk_flux=(0.375, 0.0583), blk_Fm=(0.555, 0.042), bulk_d13C_true=None)[source]¶ Method to blank- and mass-balance correct raw isotope values.
Parameters: - blk_d13C (tuple) – Tuple of the blank d13C composition (VPDB), in the form
(mean, stdev.) to be used of
blk_corr = True
. Defaults to the NOSAMS RPO blank as calculated by Hemingway et al., Radiocarbon 2017. - blk_flux (tuple) – Tuple of the blank flux (ng/s), in the form (mean, stdev.) to
be used of
blk_corr = True
. Defaults to the NOSAMS RPO blank as calculated by Hemingway et al., Radiocarbon 2017. - blk_Fm (tuple) – Tuple of the blank Fm value, in the form (mean, stdev.) to
be used of
blk_corr = True
. Defaults to the NOSAMS RPO blank as calculated by Hemingway et al., Radiocarbon 2017. - bulk_d13C_true (None or array) – True measured d13C value (VPDB) for bulk material as measured independently (e.g. on a EA-IRMS). If not None, this value is used to mass-balance-correct d13C values as described in Hemingway et al., Radiocarbon 2017. If not none, must be inputted in the form [mean, stdev.]
Warning
- UserWarning
- If already corrected for blank contribution
- UserWarning
- If already corrected for 13C mass balance
References
- [1] J.D. Hemingway et al. (2017) Assessing the blank carbon
- contribution, isotope mass balance, and kinetic isotope fractionation of the ramped pyrolysis/oxidation instrument at NOSAMS. Radiocarbon, 59, 179-193.
- blk_d13C (tuple) – Tuple of the blank d13C composition (VPDB), in the form
(mean, stdev.) to be used of