Nafion contains sulfonic acid, whose functional groups ( R-SO3H) in the polymer chain,react with hydroxyl and amine groups in the same way as with H2O. Nafion also functions as an acid catalyst due to the strongly acid properties of the sulfonic acid. As a strong acid catalyst, nafion converts organic compounds susceptible to acid catalysis into other compounds.Strictly speaking the compound is not removed from the sample gas, but it is converted into another compound instead.acid catalysis often occurs with compounds that have