prEN ISO 7012-1
(Main)Paints and varnishes - Determination of preservatives in water-dilutable coating materials - Part 1: Determination of in-can free formaldehyde (ISO/DIS 7012-1:2024)
Paints and varnishes - Determination of preservatives in water-dilutable coating materials - Part 1: Determination of in-can free formaldehyde (ISO/DIS 7012-1:2024)
The method describes the quantitative determination of the concentration of in-can free formaldehyde in water-dilutable coating materials.
Note: The standard can also be applied for polymer dispersions.
The determination method for in-can free formaldehyde can be only of limited suitability for pigmented systems, as the inherent coloration of the material may have an influence on the detection method.
Lacke und Anstrichstoffe - Bestimmung von Konservierungsmitteln in wasserverdünnbaren Beschichtungsstoffen - Teil 1: Bestimmung des freien Formaldehyds in der Dose (ISO/DIS 7012-1:2024)
Peintures et vernis - Dosage des agents de préservation dans les produits de peinture diluables à l’eau - Partie 1: Dosage du formaldéhyde libre en pot (ISO/DIS 7012-1:2024)
Barve in laki - Določanje konzervansov v premazih, topnih v vodi - 1. del: Določanje prostega formaldehida v pločevinki/posodi (ISO/DIS 7012-1:2024)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2024
Barve in laki - Določanje konzervansov v premazih, topnih v vodi - 1. del:
Določanje prostega formaldehida v pločevinki/posodi (ISO/DIS 7012-1:2024)
Paints and varnishes - Determination of preservatives in water-dilutable coating
materials - Part 1: Determination of in-can free formaldehyde (ISO/DIS 7012-1:2024)
Lacke und Anstrichstoffe - Bestimmung von Konservierungsmitteln in
wasserverdünnbaren Beschichtungsstoffen - Teil 1: Bestimmung des freien
Formaldehyds in der Dose (ISO/DIS 7012-1:2024)
Peintures et vernis - Dosage des agents de préservation dans les produits de peinture
diluables à l’eau - Partie 1: Dosage du formaldéhyde libre en pot (ISO/DIS 7012-1:2024)
Ta slovenski standard je istoveten z: prEN ISO 7012-1
ICS:
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 7012-1
ISO/TC 35/SC 16
Paints and varnishes —
Secretariat: DIN
Determination of preservatives in
Voting begins on:
water-dilutable coating materials —
2024-03-14
Part 1:
Voting terminates on:
2024-06-06
Determination of in-can free
formaldehyde
ICS: 87.040
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Reference number
ISO/DIS 7012-1:2024(en)
DRAFT
ISO/DIS 7012-1:2024(en)
International
Standard
ISO/DIS 7012-1
ISO/TC 35/SC 16
Paints and varnishes —
Secretariat: DIN
Determination of preservatives in
Voting begins on:
water-dilutable coating materials —
Part 1:
Voting terminates on:
Determination of in-can free
formaldehyde
ICS: 87.040
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland Reference number
ISO/DIS 7012-1:2024(en)
ii
ISO/DIS 7012-1:2024(en)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
4.1 General .3
4.1.1 Equilibria of in-can free formaldehyde in the coating matrix .3
4.1.2 Equilibria of in-can free formaldehyde during extraction .3
4.1.3 Equilibria of in-can free formaldehyde during derivatisation .3
4.2 Principle of Method A: Derivatisation with Acetylacetone (ACAC) combined with
photometric detection .3
4.2.1 Derivatisation with Acetylacetone (ACAC) .3
4.2.2 Detection and quantification with a spectral photometer .4
4.3 Principle of Method B: Derivatisation with Dinitrophenylhydrazine (DNPH) combined
with Liquid chromatographic separation and UV/VIS detection .4
4.3.1 Derivatisation with Dinitrophenylhydrazine (DNPH) .4
4.3.2 Separation, detection and quantification with LC-UV/VIS .4
4.4 Principle of Method C: Liquid chromatographic separation followed by post-column
derivatisation with acetylacetone and subsequent quantification with UV/VIS detection .4
4.4.1 Separation of free formaldehyde by liquid chromatography .4
4.4.2 Post-column derivatisation with acetylacetone (ACAC) and quantification with
UV/VIS detection .4
5 Apparatus . 4
5.1 General equipment .4
5.2 Apparatus for extraction .5
5.3 Apparatus for method A: photometric method with ACAC-derivatisation .5
5.4 Apparatus for method B: LC-UV/VIS method with DNPH derivatisation .5
5.5 Apparatus for method C: LC with post-column ACAC derivatisation and UV/VIS
detection .5
6 Reagents and materials . 6
6.1 General .6
6.2 METHOD A: Reagents for derivatisation with ACAC .6
6.3 METHOD B: Reagents for derivatisation with DNPH .7
6.4 METHOD C: Reagents for post-column derivatisation with ACAC.7
6.5 Reagents for titration of formaldehyde standard .8
6.5.1 General .8
7 Procedure . 8
7.1 Sampling .8
7.2 Extraction .8
7.3 Analysis and Detection: Method A: Derivatisation with Acetylacetone (ACAC) combined
with photometric detection .9
7.3.1 Procedure for derivatisation with ACAC .9
7.3.2 Photometric analysis of calibration solutions .9
7.3.3 Sample measurement for photometric analysis .9
7.3.4 Quantification of the in-can free formaldehyde content .10
7.4 Analysis and Detection: Method B: Derivatisation with Dinitrophenylhydrazine
(DNPH) combined with Liquid chromatographic separation and UV/VIS detection .10
7.4.1 Procedure for derivatisation with DNPH .10
7.4.2 LC method.11
7.5 Analysis and Detection: Method C: Liquid Chromatography separation with post-
column ACAC derivatisation and UV/VIS detection . 12
7.5.1 LC method. 12
iii
ISO/DIS 7012-1:2024(en)
8 Precision . 14
8.1 General .14
8.2 Repeatability limit r .14
8.3 Reproducibility limit R .14
9 Test report .15
Annex A (normative) . 16
Annex B (informative) Example of HPLC conditions for method B: derivatisation with DNPH .18
Annex C Example of HPLC conditions for method C: post-column derivatisation with ACAC. 19
Annex D (informative) Results of the interlaboratory test .20
Bibliography .21
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