3856/2 OSI International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEKAYHAPOAHAR OPFAHM3ALMA nO CTAHAA TW3ALMM*ORGANISATION INTERNATIONALEDENORMALISATION ANsi Interuat Doc Sec Paints and varnishes --. Determination of "soluble"" metal content Part 2: Determination of antimony content - Flame atomic absorption spectrometric method and Rhodamine B spectrophotometric method Peintures et vernis -Determination dela teneurenmetaux rsolublesw--Partie2:Determination dela teneur en antimoine Methodepar spectrometried'absorption atomiquedansla flamme etmethode spectrophotometriquea la rhodamineB Secondedition-1984-11-01 $O 3856/2-1984 (E) UDC667.6:543.422:546.86 Ref.No.1SO3856/2-1984(E) Descriptors: paints, varnishes, printing inks, pigments, chemical analysis, determination of content, soluble matter, antimony atomic absorption spectrometry,spectrophotometry. Price based on 6 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.Eachmember body interested in a subject for which a technical committee hasbeen 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 thememberbodies forapproval before theiracceptanceas International Standards by the ISo Council. They are approved in accordance with ISO procedures requiring at least 75% approval by themember bodies voting. International Standard ISO3856/2wasprepared byTechnical Committee ISO/TC35, Paintsandvarnishes. ISo 3856/2 was first published in 1980. This second edition cancels and replaces the first edition, of which it constitutes a thorough revision. InternationalOrganizationforStandardization,1984 Printed in Switzerland INTERNATIONALSTANDARD ISO3856/2-1984(E) Paints and varnishes - Determination of "soluble" metal content Part 2: Determination of antimony content - Flame atomic absorption spectrometric method and Rhodamine B spectrophotometric method 0Introduction Iso4800,Laboratoryglassware Separating funnels and dropping funnels. This International Standard is a part of ISo 3856, Paints and ISo6713,Paints andvarnishes-Preparationofacidextracts varnishes-Determinationof"soluble""metalcontent from paints in liquid or powderform. 1Scopeandfieldofapplication This part of ISo 3856 describes two methods for the deter- Flame atomic absorption spectrometric 3 mination of the antimony content of the test solutions prepared method according toISo6713 or other suitable nternational Standards. 3.1 Principle Thc methods arc applicable to paints having"soluble"anti mony contents in the range of about 0,05 to 5 % (m/m). Aspiration of the test solution into an acetylene/air flame. Measurement of the absorption of the selected spectral line The flame atomic absorption spectrometric (AAS)method emittedbyanantimonyhollow-cathodeorantimonydischarge (clause 3) should be used as the referee method in cases of lamp, in the region of 217,6 nm (see also 3.5). dispute. Other methods can be used by agreerment between the interested parties. If a spectrophotometric method is agreed, 3.2 Reagentsandmaterials theRhodamineBspectrophotometricmethod(clause4) should be used. During the analysis, use only reagents of recognized analytical grade and only water of at least grade 3 purity according to 2References ISO3696. ISo385/1Laboratoryglassware Part 1: 3.2.1Hydrochloric acid,approximately37% (m/m) (@ ap Burettes Generalrequirements.1) proximately 1,18 g/ml). ISo648,Laboratoryglassware--One-mark pipettes. 3.2.2 Hydrochloric acid, c(HCl) = 1 mol/l. Iso1042,Laboratoryglassware-- One-mark volumetric 3.2.3 Acetylene, commercial grade, in a steel cylinder. flasks. ISo 3696, Water for laboratory use -- Specific