ISO INTERNATIONAL STANDARD 2977 Third edition 1997-07-15 Petroleum products and hydrocarbon solvents - Determination of aniline point and mixed aniline point Produits pétroliers et solvants hydrocarbonés -- Détermination du point d'aniline et du point d'aniline en melange ISO Reference number ISO 2977:1997(E) No reproduction or networking permitted without license from IHS Not for Resale ISO 2977:1997(E) 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, governmental and non- governmental, in liaison with isO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. ISO/TC 28, Petroleum products and lubricants. This third edition cancels and replaces the second edition (IsO 2977:1989) which has been technically revised, in particular with the inclusion of annexF. Annexes A to F form an integral part of this International Standard. @ISO1997 or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 . CH-1211 Geneve 20 . Switzerland Internet [email protected] X.400 C=ch; a=40Onet; p=iso; o=isocs; S=central Printed in Switzerland 中 e from IHS Not for Resale ISO 2977:1997(E) INTERNATIONAL STANDARD ISO Petroleum products and hydrocarbon solvents - Determination of aniline point and mixed aniline point WARNING -- The use of this International Standard may involve hazardous materials, operations and with its use. It is the responsibility of the user of this International Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Scope This International Standard specifies a method for the determination of the aniline point of petroleum products and hydrocarbon solvents, and the mixed aniline point of those products having aniline points below the temperature at which aniline will crystallize from the aniline-sample mixture. and for those with an aniline point below the bubble point and above the solidification point of the aniline-sample mixture. Method 2, a thin film method, describes a procedure for samples too dark for testing by method 1. Methods 3 and 4 are for samples that may vaporize appreciably at the aniline point. NOTE 1 Method 4 is particularly suitable where only small quantities of sample are available. Method 5 describes a procedure using automated or automatic apparatus suitable for the range covered by methods 1 and 2. analysis of hydrocarbon mixtures. Aromatic hydrocarbons exhibit the lowest values and paraffins the highest, with cycloparaffins and olefins exhibiting intermediate values. In a homologous series, the aniline points increase with increasing molecularmass. NOTE 3 Although the aniline point can be used in combination with other physical properties in correlative methods for hydrocarbonmixtures. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the Copyright International Organization for Standardization Not for Resale