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.

Draft international standards adopted by technical committees are circulated to member bodies for approval before they are accepted as international standards by the ISO Council. They are approved according to ISO procedures that require at least 75% approval by voting member institutions.

The international standard ISO 3856/3 was developed by Technical Committee ISO/TC 35, Paints and varnishes.

ISO 3856/3 was first published in 1980. The second edition cancels and replaces the first edition, which is a complete revision of the first edition.

ISO 3856-3-1984 “Paints and varnishes – Determination of” soluble “metal content – Part 3: Determination of barium content – Flame atomic emission spectrometry”

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

Scope and field of application
This part of ISO 3856 describes a flame atomic emission spectroscopy (AES) method for determining the barium content of test solutions prepared according to ISO 6713 or other appropriate international standards.

The method is suitable for coatings with a “soluble” barium content in the range of approximately 0.05 to 5% (m/m).

Other methods can be used by agreement between interested parties, but this method is the referee method in a dispute situation.

2 Reference Materials
ISO 385/1, laboratory glassware — Burettes — Part: general requirements.

ISO 648, Laboratory glassware — Single label pipettes.

ISO 1042, Laboratory glassware — Single-labeled volumetric flasks.

ISO 3696, laboratory water use — Specification.

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

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