Description of BS EN ISO 21268-2:2019 2019
This document specifies a test providing information on leaching
of soil and soil materials under the experimental conditions
specified hereafter, and particularly at a liquid to solid ratio of
10 l/kg dry matter.
The document has been developed to measure the release of
inorganic and organic substances from soil and soil-like material
as well as to produce eluates for subsequent ecotoxicological
testing. For ecotoxicological testing, see ISO 15799[ 6] and ISO 17616[ 7].
NOTE 1
Volatile organic substances include the low-molecular-weight
substances in mixtures such as mineral oil.
NOTE 2
It is not always possible to optimize test conditions
simultaneously for inorganic and organic substances and optimum
test conditions can also vary between different groups of organic
substances. Test requirements for organic substances are
generally more stringent than those for inorganic substances. The
test conditions suitable for measuring the release of organic
substances will generally also be applicable to inorganic
substances.
NOTE 3
Within the category of organic substances, a significant
difference in behaviour exists between the more polar, relatively
water-soluble compounds and apolar, hydrophobic organic
substances (HOCs). In the latter case, mechanisms of release
(e.g. particle-bound or dissolved organic carbon-bound) can be
more crucial as well as sorption losses of soluble HOCs on
different materials with which they come in contact (e.g.
bottles, filters). The test and the results should be used for
leaching of organic substances only with thorough consideration
of the specific properties of the substances in question and the
associated potential problems.
NOTE 4
For ecotoxicological testing, eluates representing the release
of both inorganic and organic substances are needed. In this
document, ecotoxicological testing is also meant to include
genotoxicological testing.
This test method produces eluates, which can subsequently be
characterized by physical, chemical and ecotoxicological methods in
accordance with existing standard methods. The test is not suitable
for substances that are volatile under ambient conditions.
This procedure is not applicable to materials with a
dry-matter-content ratio lower than 33 %.
This test is mainly aimed at being used for routine and control
purposes, and it cannot be used alone to describe all leaching
properties of a soil. Additional leaching tests are needed for that
extended goal. This document does not address issues related to
health and safety. It only determines the leaching properties as
outlined in Clause 4.
About BSI
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