A Preface
ISO (International Organization for Standardization) is a global alliance of national standards bodies (ISO member bodies). The development of international standards is usually carried out through ISO technical committees. Each member institution interested in a subject on which a technical committee has been established has the right to be represented in the committee. Government and non-governmental international organizations that liaize with standardization organizations are also involved in this work. ISO works closely with the International Electrotechnical Commission (IEC) on all matters of electrical standardization.

International standards are drafted according to the rules given in Part 2 of the ISO/IEC Directive.

The main task of the technical committee is to develop international standards. Draft international standards adopted by the Technical Committee will be circulated to member bodies for voting. Publication as an international standard requires approval by at least 75% of member institutions.

ISO 11890-1-2007 – Determination of volatile organic Compounds (VOC) content in paints and varnishments – Part 1- Difference method

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ISO 11890-1 was developed by Technical Committee ISO/TC 35, Paints and varnishments.

The second edition cancels and replaces the technically revised first edition (ISO 11890-1:2000). The main change is that in order to make the method applicable to both multicomponent and single-component systems, the preparation procedure for the test part for determining the non-volatile content of each of these two types of systems has been included in Item 7.4.

ISO 11890 consists of the following parts, general heading Paints and varnishments – Determination of volatile organic Compounds (VOC) content:

— Part 1: Difference method

— Part 2: Gas chromatography

ISO 11890-1-2007 – Determination of volatile organic Compounds (VOC) content in paints and varnishments – Part 1- Difference method

1 Scope
This part of ISO 11890 is one of a series of standards dealing with the sampling and testing of paints, varnishes and related products.

It provides a method for determining the content of volatile organic compounds (VOC) in paints, varnishes and their raw materials. This part can be used where the VOC content is expected to be greater than 15% by mass. ISO 11890-2 should be used when the expected VOC content is greater than 0.1 mass % and less than 15 mass %.

This method assumes that the volatile matter is water or organic matter. However, other volatile inorganic compounds may be present and may need to be quantified by another suitable method and allowed in the calculations.

2 Normative references
The following references are required for the application of this document. For dated references, only the cited version applies. For undated references, the new version of the reference (including any revisions) applies.

ISO 760, Determination of moisture – Karl Fischer method (general method)

ISO 1513, Paints and varnishes – Examination and preparation of test samples

ISO 2811-1, Paints and varnishes — Determination of density — Part 1: Specific gravity bottle method

ISO 2811-2, Paints and varnishes — Determination of density — Part 2: immersion (plunge) method

ISO 2811-3, paints and varnishes — Determination of density — Part 3: oscillatory method

ISO 2811-4, paints and varnishes — Determination of density — Part 4: pressure cup method

ISO 3251-2003, determination of nonvolatile contents in paints, varnishments and plastics

ISO 3270, Paints and varnishes and their raw materials – temperature and humidity regulated and tested

ISO 11890-2, Paints and varnishes — Determination of volatile organic compounds (VOC) content — Part 2: Gas chromatography

ISO 15528, Paints, varnishes and raw materials for paints and varnishes – Sampling

ISO 11890-1-2007 – Determination of volatile organic Compounds (VOC) content in paints and varnishments – Part 1- Difference method

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

3.1 Volatile Organic Compounds
Volatile organic compounds

Any organic liquid and/or solid that evaporates spontaneously at the prevailing temperature and pressure of the atmosphere with which it is in contact

Note 1: For the correct use of the term VOC in the field of coating materials, see Volatile Organic Compound content (VOC content).

Note 2: Under U.S. government legislation, the term VOC is limited to those compounds that are photochemically active in the atmosphere (see ASTM D 3960). Any other compound is defined as an exempt compound.

[Source: ISO 4618:2006]

Note 3: According to European legislation, EU Directive 2004/42/EC, the term VOC refers to volatile organic compounds with boiling points up to 250 °C, measured at a standard pressure of 101,3 kPa.

3.2 Volatile organic compound content
Volatile organic compound content

ISO 11890-1-2007 – Determination of volatile organic Compounds (VOC) content in paints and varnishments – Part 1- Difference method

The quality of volatile organic compounds present in the coating material, determined under the specified conditions

Note 1: The nature and number of compounds to be considered will depend on the application area of the coating material. For each application area, limit values as well as determination or calculation methods are specified by regulation or agreement.

[Source: ISO 4618:2006]

Note 2: If the term VOC refers to a compound with a prescribed maximum boiling point (see Notes 3 to 3.1), compounds considered to be part of the VOC content are those with boiling points below that limit, while compounds with higher boiling points are considered non-volatile organic compounds.

3.3 Exempted Compounds
Organic compounds that do not participate in atmospheric photochemical reactions

Note 1: See notes 2 and 3 to 3.1.

3.4 Readily Available
The product is mixed in the correct proportions according to the manufacturer’s instructions and diluted (if necessary) in its state when the correct diluent is used in order to be ready for use by the approved method

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