ISO 3856-7-1984 Paints and varnishes — Determination of “soluble” metal content — Part 7: Determination of mercury content in the pigment portion of paints and the liquid portion of water-dilutive paints — flameless atomic absorption spectrometry

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 on that committee. International governmental and non-governmental organizations liaising with ISO are also involved in this work.

Draft international standards adopted by technical committees are circulated to member bodies for approval before being accepted as international standards by the ISO Council. They are approved under the ISO process, which requires at least 75 per cent approval from voting member bodies.

The international standard ISO 3856/7 was developed by the Technical Committee ISO/TC 35, Paints and Varnishes.

0 Introduction
This international standard is part of ISO 3856, Paints and varnishes – Determination of “soluble” metal content.

1 Scope and domain of application
This part of ISO 3856 describes a flameless atomic absorption spectrometry method for the determination of mercury content in test solutions, prepared in accordance with ISO 6713 or another appropriate international standard.

This method is suitable for paints with a “soluble” mercury content in the range of approximately 0,005 to 0,05 % (m/m), but the part of the method that covers the liquid portion of the paint to be examined is limited to water-diluted paints.

Note – ISO 3856 The procedures described in this section are intended to be performed by qualified chemists or other appropriately trained and/or supervised personnel. The substances and procedures used in this method may be harmful to health if proper precautions are not taken. The text draws attention to certain specific risks (see 4.6 and 4.7). This part of ISO 3856 relates only to its technical applicability and does not exempt users from statutory obligations relating to health and safety.

ISO 3856-7-1984 Paints and varnishes — Determination of “soluble” metal content — Part 7: Determination of mercury content in the pigment portion of paints and the liquid portion of water-dilutive paints — flameless atomic absorption spectrometry

2 Reference Materials
IS0 385/1, Burette for laboratory glassware – Part 1: Genus/requirement. 1)

ISO 648, laboratory glassware – Single mark pipettes.

ISO 1042, Single label volumetric bottles for laboratory glassware.

ISO 3696, Laboratory water – Specification. 2)

ISO 6713, Paints and varnishes — Preparation of acid extracts from paints in liquid or powder form.

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