FORFARANDE FOR KVANTITATIV METNING AV NH?713 I ETT PROV SAMT ANORDNING FOR UTFORANDE AV FORFARANDET

摘要

The NH3-concentration in a sample is determined by the aid of a device, comprising a layer of a polymer, based upon pyrrole or a derivative of pyrrole, or a derivative of such a polymer. The layer is acted upon by NH3, originating from the sample, and its resistance is measured before and after this action. Increasing concentrations of NH3 mean increasing resistance in said layer.