# CYANA Function: ipel

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## Synopsis

**ipel( integer,integer) = integer**

## Description

This function returns the ordinal number (number of protons, e.g., 1 for hydrogen, 6 for carbon, 7 for nitrogen) of the nucleus that was detected for the k-th dimension of the n-th peak list, where n and and k denote, respectively, the first and the second argument of the function.