Several arithmetic operators (+, -, *, /) are implemented to work with specific isotope value object to allow shorthand data type conversions and calculations. Operations are generally only permitted if the two isotope objects being combined have matching attributes (isotope name, major isotope, etc.).

intensity +- intensity

abundance +- abundance

delta +- delta

alpha - 1

delta * 1000

ff * ratio

delta * delta

intensity / intensity

ratio / ratio

ff / ff

delta / delta

Details

intensity+-intensity allows the addition of intensity values, the result is a another intensity object

abundance+-abundance is a shorthand for calculating the isotopic mass balance of two abundance objects, see mass_balance for details

delta+-delta is a shorthand for calculating the isotopic mass balance of two delta objects, see mass_balance for details

alpha - 1 is a shorthand for converting a fractionation factor from alpha to epsilon notation. The ff object has to be in alpha notation, otherwise this is just interpreted as a regular arithmetic operation and the result will no longer be an isotope object. eps + 1 is the reverse operation.

delta * 1000 is a shorthand for converting a raw delta value to permil notation or permil to ppm. The same works for fractionation factors in epsilon notation. delta / 1000 is the reverse

ff*ratio, ff*ff, ff*delta are a shorthand for fractionating an isotope object with a factionation factor, see fractionate for details

delta*delta, is a shorthand for shifting the reference frame of the first delta value to that of the second (requires the compound measured in the second to be the reference of the first!), see shift_reference for details

intensity/intensity allows the creation of an isotope ratio object

ratio/ratio allows the creation of an isotope fractionation_factor This is a shorthand for the to_ff function.

ff/ff allows the creation of another isotope fractionation_factor object but requires that either the denominator names or numerator names of the two objects are identical (i.e. they "cancel"). This is a shorthand for the to_ff function.

delta/delta creates an fractionation_factor object that describes the fractionation factor between the two compounds, requires the reference name of the two delta values to be identical. This is a shorthand for the to_ff function.