3856/2 (ISO International Standard INTE RNATIONAL ORGANiZATION FOR STANDARDIzATIONMEXAyHAPOAHAR OPrAHW3ALWR nO CTAHAAPTM3AuMW?ORGANiSATION INTe RNATIONALE DE NORMALISATION ANsl Intarnut Do 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 de la teneur en metaux 《solublesw -- Partie 2: Determination de la teneur'en antimoine .- Methode par spectrometrie d'absorption atomique dans la flamme et methode spectrophotometrique a la rhodamine B Second edition -- 1984-11-01 UDC 667.6 : 543.422 : 546.86 Ref. No. 1ISO 3856/2-1984 (E) SO 3856/2-1984 ( Descriptors: paints, varnishes, printing inks, pigments, chemical analysis, determination of content, soluble matter, antimony, atomic absorption spectrometry, spectrophotometry. Price based on 6 pages 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 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 least 75 % approval by the member bodies voting. International Standard ISO 3856/2 was prepared by Technical Committee ISO/Tc 35, Paints and varnishes. Iso 3856/2 was first published in 1980. This second edition cancels and replaces the first edition, of which it constitutes a thorough revision. @ International Organization for Standardization, 1984 Printed in Switzeriand Copyright International Organization for Standardization nsefromIHS ISO 3856/2-1984 (E) INTERNATIONAL STANDARD Paints and varnishes - Determination of "soluble" metal content Part 2: Determination of antimony content - Flame atomic absorption spectrometric method and Rhodamine B spectrophotometric method 0 Introduction so 4800, Laboratory glassware Separating funnels and dropping funnels. 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. 1 Scope and field of application This part of ISO 3856 describes two methods for the deter. 3 Flame atomic absorption spectrometric mination of the antimony content of the test solutions prepared method according to IS0 6713 or other suitable International Standards. 3.1 Principle The methods are 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 (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 agreement between the interested parties. If a spectrophotometric method is agreed, 3.2 Reagents and materials the Rhodamine B spectrophotometric method (clause 4) should be used. During the analysis, use only reagents of recognized analytical grade and only water of at least grade 3 purity according to ISO 3696. 2 References Iso 385/1, Laboratory glassware 3.2.1 Hydrochloric acid, approximately 37 % (m/m) (o ap Burettes Part 1: General requirements. 1) proximately 1,18 g/ml). ISo 648, Laboratory glassware -- One-mark pipettes. 3.2.2 Hydrochloric acid, c(HCl) = 1 mol/l. ISo 1042, Laboratory glassware -- One-mark volumetric 3.2.3 Acetylene, commercial grade, in a steel cylinder. flasks. Iso 3696, Water for laboratory use -- Specifications.2) 3