8174 International Standard (TSO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEKAYHAPOAHAR OPTAHM3ALMA NO CTAHAAPTW3ALWWORGANISATION INTERNATIONALE DE NORMALISATION Ethylene and propylene for industrial use Determination of acetone, acetonitrile, propan-2-ol and methanol -- Gas chromatographic method Ethylene et propylene a usage industriel --Dosage de I'acetone, de I'acétonitrile, du propanol-2 et du methanol -Methode par chromatographieenphasegazeuse First edition - 1986-06-15 1141986 UDC 661.716.2 : 543.544 Ref.No.ISO 8174-1986 (E) Descriptors : industrial products, chemical compounds, -ethylene, propylene, chemical analysis, determination of content, acetone, acetonitrile, propan-2-ol, methanol, chromatographic analysis. Price based on 6 paaes 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 ISso 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 8174 was prepared by Technical Committee ISO/TC 47, Chemistry Users should note that all International Standards undergo revision from time to time latest edition, unless otherwise stated. ? international Organization for Standardization,1986 Printed in Switzerland Convrinht Internatinnal Ornanizatinn for Stanrlardization ISO8174-1986 (E) INTERNATIONALSTANDARD Ethylene and propylene for industrial use Determination of acetone, acetonitrile, propan-2-ol and methanol --- Gas chromatographic method 1 Scope and field of application 4.3 Acetone. This International Standard specifies a gas chromatographic 4.4 Propan-2-ol. method forthe determinationofacetone,acetonitrile,propan- 2-ol and methanol in ethylene and propylene (propene) for in dustrial use. 4.5 Methanol. The method is applicable to products having acetone, propan 4.6 Acetonitrile. 2-ol and methanol concentrations greater than 1 mg/kg, and acetonitrile concentrations greater than 10 mg/kg. 4.7 Standard mixture, aqueous solution containing 20 mg of each impurity to be determined per litre. 2 References ISo6377, Light olefins for industrial use -Determination of 5 Apparatus impuritiesby gas chromatography-General considerations. 5.1 Absorption train (see figure 1), comprising ISo 7382, Ethylene for industrial use - Sampling in the liquid and the gaseous phase.1) a flow meter capable of measuring flow rates between 5 and 100 I/h; Iso 8563, Propylene and butadiene for industrial use - Sampl- three absorption flasks (A, B and C) with sintered glass ing in the liquid phase. 1) discs (see figure 2); 3Principle a gas meter, graduated every 10 ml. Passage of a gaseous test portion through water to absorb 5.2 Water bath, capable of being controlled between O and acetone, acetonitrile, propan-2-ol and methanol, and subse- 5 °C. quent gas chromatographic analysis of the aqueous solution, using a flame ionization detector, and comparison of the peaks 5.3 Vaporization device (seeISO 6377,clause 4). obtained, with those derived from an external standard. 5.4Chromatograph,fitted with aflameionization detector, 4 Reagents and materials which will yieid a peak height of at least five times the noise level at concentrations for each of the impurities as given in During the analysis, use only reagents of recognized analytical clause 1. grade and only distilled water or water of equivalent purity. 5.4.1 Injection device (see Is0