NBN ISO 12828-2:2021

This document describes tools and techniques for use in validating the analysis of fire gases when an
analytical method is developed in a laboratory. It complements ISO 12828-1, which deals with limits of
quantification and detection.
The tools and techniques described can be applied to the measurement of quantities, concentrations
(molar and mass), volume fractions, and concentration or volume fraction versus time analyses. Fire
effluents are often a complex matrix of chemical species, strongly dependent on the materials involved
in the fire, but also dependent on fire scenario parameters (see ISO 19706). With such a wide variety
of conditions, the analytical techniques available will differ in terms of the influence of the matrix
on the methods and on the concentration ranges which can be measured. The analytical techniques
available are likely to differ significantly in several respects, such as their sensitivity to the matrix and
the range of concentrations/ volume fractions which can be reliably measured. For these reasons, a
unique reference analytical technique for every fire effluent of interest is, in practical terms, difficult
or impossible to achieve. The tools in this document allow verification of the reliable measurement
ranges and conditions for the analysis of fire effluents, thereby enabling a comparison among various
analytical techniques.
Examples of existing International Standards where the information contained in this document can
be used are the analytical chemical methods in ISO 19701, ISO 19702, ISO 5660-1, and the chemical
measurements in the methods discussed in ISO/ TR 16312-2, ISO 16405, or their application to fire
toxicity assessment using ISO 13571 and ISO 13344.
NOTE 1 The variable “concentration” is used throughout this document, but it can be replaced in all places
with “volume fraction” without altering the meaning. This does not apply to the Annexes.
NOTE 2 Concentration can be calculated from volume fraction by multiplying by the density of the relevant
gas at the relevant temperature and pressure.