to_VSMOW {isogeochem}

Converting isotope delta from VPDB to VSMOW

Description

to_VSMOW() converts d18O value expressed on the VPDB scale to the VSMOW scale.

Usage

to_VSMOW(d18O_VPDB, eq = "IUPAC")

Arguments

d18O_VPDB

d18O values expressed on the VPDB scale (‰).

eq

Equation used for the conversion.

• "IUPAC" (default): the IUPAC recommended equation listed in Brand et al. (2014) and Kim et al. (2015).

• "Coplen83": the equation listed in Coplen et al. (1983) and the Hoefs book.

Details

The IUPAC recommended equation to convert between the scales is:

\delta^{18}O_{VSMOW} = 1.03092 \times \delta^{18}O_{VPDB} + 30.92

Value

Returns the d18O value expressed on the VSMOW scale (‰).

References

Coplen, T. B., Kendall, C., & Hopple, J. (1983). Comparison of stable isotope reference samples. Nature, 302, 236-238. doi:10.1038/302236a0

Brand, W. A., Coplen, T. B., Vogl, J., Rosner, M., & Prohaska, T. (2014). Assessment of international reference materials for isotope-ratio analysis (IUPAC Technical Report). Pure and Applied Chemistry, 86(3), 425-467. doi:10.1515/pac-2013-1023

Kim, S.-T., Coplen, T. B., & Horita, J. (2015). Normalization of stable isotope data for carbonate minerals: Implementation of IUPAC guidelines. Geochimica et Cosmochimica Acta, 158, 276-289. doi:10.1016/j.gca.2015.02.011

See Also

to_VPDB() converts d18O values expressed on the VSMOW scale to the VPDB scale.

Examples

to_VSMOW(0)
to_VSMOW(0, eq = "Coplen83")