3856/7 (TSO International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAA OPTAHW3AMA NO CTAHAAPTW3AUMWORGANISATION INTERNATIONALE DE NORMALISATION metal content Part 7 : Determination of mercury content of the pigment portion of the paint and of the liquid portion of water- dilutable paints . Flameless atomic absorption spectrometric method Peintures et vernis - Détermination de la teneur en métaux rsolubles) -- Partie 7 : Détermination de la teneur en mercure contenu dans le pigment et dans la fraction liquide des peintures hydrodiluables - Methode par spectrometrie d'absorption atomique sans flamme First edition - 1984-12-15 (3) UDC 667.6 : 543.422 : 546.49 Ref. No. ISO 3856/7-1984 (E) SO 3856/7-1984 Descriptors : paints, varnishes, pigments, chemical analysis, determination of content, soluble matter, mercury, atomic absorption method. Price based on 8 pages e from IHS Not for Resale Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with IsO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with IsO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 3856/7 was prepared by Technical Committee ISO/TC 35, Paint and varnishes International Organization for Standardization, 1984 Printed in Switzerland Copyright International Organization for Standardization e from IHS Not for Resale INTERNATIONAL STANDARD ISO 3856/7-1984 (E) Paints and varnishes -- Determination of "soluble" metal content Part 7 : Determination of mercury content of the pigment portion of the paint and of the liquid portion of water- dilutable paints -- Flameless atomic absorption spectrometric method 0 Introduction ISo 3696, Water for laboratory use - Specifications.2) This International Standard is a part of ISO 3856, Paints and ISO 6713, Paints and varnishes --- Preparation of acid extracts varnishes - Determination of "soluble" metal content. from paints in liquid or powder form. Scope and field of application Principle 1 3 This part of IS0 3856 describes a flameless atomic absorption Oxidation of the mercury compounds contained in the test spectrometric method for the determination of the mercury solution obtained from the pigment portion of the paint or content of the test solutions, prepared according to Iso 6713 combustion with oxygen in an enclosed system of the or other suitable International Standards. evaporation residue of the test solution obtained from the liquid portion of water-dilutable paints. The method is applicable to paints having "soluble" mercury contents in the range of about 0,005 to 0,05 % (m/m), but the Reduction of the mercury(ll) compounds contained in the part of this method covering the examination of the liquid portion of the paint is restricted to water-dilutable paints mercury in a current of gas at ambient temperature and determination of the mercury, as the monoatomic vapour, by CAUTION - The procedures described in this part of cold vapour (flameless) atomic absorption spectrometry at a ISO 3856 are intended to be carried out by qualified wavelength in the region of 253,7 nm. chemists or by other suitably trained and/or supervised personnel. The substances and procedures used in this method may be injurious health if adequate Reagents and materials precautions are not taken. Attention is drawn in the text (see 4.6 and 4.7) to certain specific haz