ISO 13741-2:2026

International
Standard
ISO 13741-2
Second edition
Plastics/rubber — Determination
2026-10
of residual monomers and other
organic components by capillary-
column gas chromatography —
Part 2:
Headspace method
Reference number
© ISO 2026
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Preparation of apparatus . 2
8 Calibration . 3
8.1 Preparation of calibration solution .3
8.1.1 General .3
8.1.2 Internal standard solution.3
8.1.3 Stock solution A .3
8.1.4 Standard solutions .4
8.1.5 Calibration solutions .4
8.2 Test calibration solutions .5
8.3 Calculate relative mass correction factor .5
9 Procedure . 5
9.1 Preparation of the sample solution (specimens) .5
9.2 Test sample solutions (specimens) .5
10 Calculation . 6
10.1 Calculate target compounds concentration in sample solutions .6
10.2 Calculate target compound content in polymer dispersions and lattices .6
11 Test report . 6
Annex A (informative) Relative correction factors. 7
Annex B (informative) Typical gas chromatograms . 8
Bibliography .11

iii
Foreword
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This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic
materials.
This second edition cancels and replaces the first edition (ISO 13741-2:1988), which has been technically
revised.
The main changes are as follows:
— the relative corrective factors for internal standard method in quantitative method are now determined
by standard addition method, rather than external standard in previous version;
— added details for the preparation of standard solutions, calibration solutions and sample solutions are
described;
— added the specification for automated headspace sampler;
— add Clause 3 Terms and definitions.
A list of all parts in the ISO 13741 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
Introduction
The requirements imposed today by authorities include the assessment of the content of residual monomers
and organic volatiles, for health and environmental reasons sometimes down to minute traces.
This document presents a method for the determination by gas chromatography of residual monomers and
other organic components in polymer dispersions and lattices. This document provides a method that is
in line with present-day requirements for analytical methods and is intended for use instead of ISO 3899,
where precise measurements of volatile-matter content are needed. This document also expands the scope
to include other volatile organic components than residue monomers.
Since the chromatograms obtained normally contain a series of peaks, it is only possible to determine
the content of those volatiles for which response factors have been determined. For the identification of
unknown peaks, auxiliary methods like mass spectroscopy or the use of a second GC column with a different
polarity are advisable.
v
International Standard ISO 13741-2:2026(en)
Plastics/rubber — Determination of residual monomers
and other organic components by capillary-column gas
chromatography —
Part 2:
Headspace method
1 Scope
This document specifies a method for the determination of residual monomers and other volatile organic
components (unsaturated or saturated) in aqueous polymer dispersions and lattices, as well as in related
products by headspace capillary-column gas chromatography (HS-GC).
This document is applicable to the determination of residual monomers and other volatiles, include acrylic
and methacrylic esters, butadiene, styrene vinyl acetate, as well as by-products such as ethylbenzene.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 124, Latex, rubber — Determination of total solids content
ISO 472, Plastics — Vocabulary
ISO 3696, Water for analytical laboratory use — Specification and test methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Principle
A suitable aliquot of the sample is diluted with water and water-miscible solvent containing internal
standard and polymerization inhibitor. The mixture is then introduced into a headspace vial. The vial is
allowed to come to thermal equilibrium before a measured quantity of the headspace vapours is introduced
into a gas chromatograph. The concentration of residual monomers and other volatiles are determined from
relative peak areas comparing to the peak area of the internal standard.
5 Reagents
Unless otherwise stated, use only reagents of recognized analytical grade and only grade 1 water as defined
in ISO 3696.
5.1 Carrier gas, helium or nitrogen.
5.2 Internal standard, methyl iso-butyl ketone. Other organic compounds not present in the sample
could also be used (e.g. dioxane). The
...