International Standard (Iso) 1388/10 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION·MEXAYHAPOAHAA OPFAHW3AUWR IO CTAHAAPTW3ALWW+ORGANISATION INTE RNATIONALE DE NORMALISATION AN Ethanol for industrial use - Methods of test - Part 10 : Estimation of hydrocarbons content Distillation method Ethanol a usage industriel -- Methodes d'essai -- Partie 10 : Evaluation des hydrocarbures - Methode par distillation First edition - 1981-11-01 UDC 661.722 : 543.824 Ref. No. ISO 1388/10-1981 (E) Descriptors : industrial products, ethanols, tests, determination of content, hydrocarbons, distillation method. Price based on 5 pages Copyright International Organization for Standardization from IHS Not for Resale Foreword tSo (the International Organization for Standardization) is a worldwide federation of national standards institutes (IsO member bodies). The work of developing Inter- national Standards is carried out through ISO technical committees. Every member body interested in a subject for which a technical committee has been set up 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. 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. ISO/TC 47, Chemistry, and was circulated to the member bodies in February 1980. It has been approved by the member bodies of the following countries : Philippines Australia France Germany, F.R. Poland Austria Hungary Belgium Romania Brazil India South Africa, Rep. of Bulgaria Italy Switzerland China Korea, Rep. of Thailand USSR Czechoslovakia Netherlands The member body of the following country expressed disapproval of the document on technical grounds : United Kingdom mendation R 1388-1970, of which they constitute a technical revision. @ International Organization for Standardization, 1981 Printed in Switzerland Copyright International Organization for Standardization e from IHS Not for Resale ISO 1388/10-1981 (E) INTERNATIONAL STANDARD Ethanol for industrial use --- Methods of test -- Part 10 : Estimation of hydrocarbons content - Distillation method Scope and field of application 4.4 Receiver for the estimation of hydrocarbons content, such as that shown in figure 2. This part of ISO 1388 specifies a distillation method for thehydrocarbonscontent of ethanol estimating for industrial use. Procedure This document should be read in conjunction with ISO 1388/1 5.1 Test portion (see the annex). Take 1 500 ± 1 ml of the laboratory sample. 5.2 Determination 2 Principle Place the test portion (5.1) in the distillation flask (4.1) and add Distillation of a test portion in the presence of water, addition 1 500 ml of water. Connect the fractionating column (4.2) to to the distillate of a saturated sodium chloride solution and the flask and connect the side arm to the Liebig condenser (4.3) measurement of the volume of insoluble hydrocarbons. fitted with its adaptor. Heat the flask so that the rate of distilla- tion does not exceed 30 drops per minute and collect the distillate in the receiver (4.4). When the distillate reaches the Reagent mark on the constricted part of the receiver (about 13 ml of distillate), stop the distillation. Add sufficient of the sodium During the analysis, use only reagent of recognized analytical chloride solution (3.1) to the receiver so that the liquid level lies grade, and distilled water or water of equivalent purity. between the 1 and 2 ml graduations. Mix the contents of the receiver by rotating it, taking care not 3.1 Sodium chloride, saturated solution at ambient to turn it upside down. Allow to stand until the liquid has temperature. as detach any drops of the hydrocarbon phase adhering to the walls of the receiver. Read the volume of the upper layer on the 4 Apparatus graduated scale of the receiver. Ordinary laboratory apparatus, an