Return heavy-to-light isotope ratio of primary standard.

Returns the heavy-to-light isotope ratio of the dominant standard for that element. Vienna Standard Mean Ocean Water (VSMOW) for oxygen and hydrogen isotopes, Vienna Pee Dee Belemnite (VPDB) for carbon stable isotopes.

Usage

get_Rstd(element)

Arguments

element

Which element to return standard ratio - carbon, oxygen, or hydrogen.

Value

Heavy-to-light isotope ratio of most common stable isotope standard. VSMOW for water, VPDB for carbon.

Author

Rich Fiorella rfiorella@lanl.gov

Examples

get_Rstd("carbon") # returns 0.0111797
#> [1] 0.0111797
get_Rstd("oxygen") # returns 2005.20e-6
#> [1] 0.0020052