NBN ISO 22262-3:2021

This part of ISO 22262 is primarily intended for quantitative analysis of samples in which asbestos has
been identified at estimated mass fractions lower than approximately 5 % by weight.
This part of ISO 22262 extends the applicability and limit of detection of quantitative analysis by the
use of simple procedures of ashing and/or acid treatment prior to XRD quantification.
This part of ISO 22262 is applicable to the asbestos-containing materials identified in ISO 22262-1. The
following are examples of sample matrices:
a) any building materials in which asbestos was detected by the analysis in ISO 22262-1;
b) resilient floor tiles, asphaltic materials, roofing felts and any other materials in which asbestos is
embedded in an organic matrix and in which asbestos was detected when using ISO 22262-1;
c) wall and ceiling plasters, with or without aggregate, in which asbestos was detected when using
ISO 22262-1.
If non-asbestiform serpentine or non-asbestiform amphibole minerals are included in the matrix, the
XRD peaks that are assumed to be “possible peaks of asbestos” will represent these minerals. This
method is not for application to natural minerals that may contain asbestos or any products that
incorporate such natural minerals. This method is intended only for application to building material
samples that contain deliberately added commercial grade asbestos including tremolite asbestos.
This part of ISO 22262 is intended for use by analysts who are familiar with X-ray diffraction methods
and the other analytical procedures specified in the References [5] and [6]. It is not the intention of this
part of ISO 22262 to provide basic instruction in the fundamental analytical procedures.