3856/7 International Standard (TSO INTE RNATIONAL ORGANIZATION FOR STANDARDIZATION+ME KAYHAPOAHAR OPIAHW3AUMA NO CTAHAAPTW3AUMW+ORGANISATION INTE RNATIONALE DE NORMALISATION 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 Peintures et vernis-Determination dela teneur en metaux 《solubles"-Partie 7:Determination de la teneur en mercure contenudans lepigmentetdanslafraction liquidedes peintures hydrodiluables-Methodepar spectrometrie d'absorption atomiquesansflamme Firstedition -1984-12-15 ISO 3856/7-1984 (E) UDC667.6:543.422:546.49 Ref.No.ISO3856/7-1984(E) Descriptors :paints, varnishes, pigments, chemical analysis, determination of content, soluble matter, mercuryatomic absorption method. Price based on 8 pages 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 memberbodies voting International Standard ISO3856/7 was prepared by Technical Committee ISO/TC 35, Paintandvarnishes. InternationalOrganizationforStandardization,1984 Printed in Switzerland INTERNATIONALSTANDARD ISO3856/7-1984 (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 s - Flameless atomic absorption spectrometric method 0 Introduction ISo3696,Waterforlaboratoryuse-Specifications.2) This International Standard is a part of ISo 3856, Paints and ISO6713,Paints and varnishes--Preparationof acid extracts varnishes-Determination of"soluble"metal content. from paints in liquid or powder form. Scopeandfield of application 3 Principle This part of ISo 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 inthe rangeof about0,005to0,05%(m/m),butthe Reduction of the mercury(ll) compounds contained in the part of this method covering the examination of the liquid resulting solutions to elementary mercury. Entrainment of the 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. personnel. The substances and procedures used in this method may be injurious to 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 hazards.This part of During the analysis, use only reagents of recognized analytical Iso 3856 refers only to its technical sui