ratio_to_fraction: Convert isotope ratio to fractional abundance

In jmerc13/LakeIsodrology: Lake isotope hydrology

Description

ratio_to_fraction is the inverse of fraction_to_ratio. For more information about this function, see documentation for the latter.

Usage

ratio_to_fraction(ratio)

Arguments

ratio

The isotope ratio of a heavy istope, [-].

Details

Equation used to convert from an isotope ratio to fractional abundance:

{}^{A}F = {}^{A}R(1 + {}^{A}R)

Where A is the isotope of interest (usually the heavy, or less common one), F is the fractional abundance between the rare and common isotope, and R is the isotope ratio.

NOTE: This function assumes only two isotopes are important in the system.

Value

A numeric value representing an isotope ratio.

jmerc13/LakeIsodrology documentation built on May 5, 2019, 5:52 p.m.