BS ISO 23919:2020 pdf free.Cigarettes一Determination of ammonia in cigarette mainstream smoke using ion chromatography. BS ISO 23919 1 Scope This document specifies a method for the quantification of ammonia by ion chromatography in mainstream smoke using ISO 3308 smoking parameters.This method is applicable to cigarettes with ammonia yields between 1 μg/cigarette and 30 μg/cigarette. It is not applicable for the...