enviPat (version 2.2)

isotopes: Stable isotopes

Description

Dataframe with stable isotopes.

Usage

data(isotopes)

Format

A data frame with 302 observations on the following 4 variables.

Source

http://physics.nist.gov/cgi-bin/Compositions/stand_alone.pl

Details

The ratioC-value stems from a database survey conducted by Kind&Fiehn (2007); to disable, set value to 0. The list serves as input into several package nontarget-functions. The first column of the data frame also contains names of specific isotopes used for labeled compounds.

References

Kind, T. and Fiehn, O., 2007. Seven golden rules for heuristic filtering of molecular formulas obtained by accurate mass spectrometry. BMC Bioinformatics, 8:105.

Examples

data(isotopes)