1104 NTERNATIONAL STANDARD TSO Surface active agents - Technical sodium alkylarylsulphonates (excluding benzene derivatives) -- Methods of analysis Agents de surface -- Alkylarylsulfonates de sodium techniques (excepte ceux derivant du benzene) : Meéthode d'analyse First edition -- 1977-11-01 NOV 3 - 1977 ANST Imort Doc Sec 1SO 1104-1977 (E) Ref. No. 1SO 1104-1977 (E) UDC 661.185 : 543 Descriptors : surfactants, sodium alkylarenesulphonates, chemical analysis, determination of content, water, pH, alkalinity, acidity. Price based on 8 pages from IHS Not for Resal FOREWORD ISO (the International Organization for Standardization) is a worldwide federation of national standards institutes (isO member bodies). The work of developing International 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 Counicil. International Standard IsO 1104 was developed by Technical Committee ISo/Tc 91, Surface active agents, and was circulated to the member bodies in November 1975. India South Africa, Rep. of Australia Austria Iran Spain Belgium Italy Switzerland Brazil Japan Turkey Canada Mexico United Kingdom Egypt, Arab Rep. of Netherlands U.S.A. U.S.S.R. France New Zealand Germany Portugal Hungary Romania No member body expressed disapproval of the document. This International Standard cancels and replaces IS0 Recommendation R 1104-1969 of which it constitutes a technical revision. @ International Organization for Standardization, 1977 Printed in Switzerland Copyright International Organization for Standardization se from IHS Not for Resal INTERNATIONAL STANDARD ISO 1104-1977 (E) Surface active agents -- Technical sodium alkylarylsulphonates (excluding benzene derivatives) - Methods of analysis 0 INTRODUCTION It is not applicable to liquid products as these often contain either solvents or additives or both, which would interfere Sodium alkylarylsulphonates have the general formula with the methods of analysis specified in this International (R)n - Ar - SO3Na Standard. and are used as surface active agents in a vast range of They are sodium salts of alkylarylsulphonic processes. 3 REFERENCES acids in which the saturated aliphatic radical R may have a mean chain length of about 12 carbon atoms; n may be IsO 607, Surface active agents -- Detergents -- Methods of equal to 1, 2 or 3 and Ar is an aromatic derivative of either sample division. 1) toluene or naphthalene. IsO 894, Surface active agents --. Technical sodium primary alkylsulphates -- Method of analysis. 1 SCOPE Is0 4314, Surface active agents -- Determination of free This International Standard specifies methods of analysis alkalinity or free acidity -- Titrimetric method. of technical sodium alkylarylsulphonates. It covers the following determinations : ISO 4316, Surface active agents - Determination of the pH of aqueous solutions - Potentiometric method. Measurement of pH. IsO 4317, Surface active agents -- Determination of water Determination of water content. content -- Karl Fischer method. -Determination of free alkalinity or free acidity. ISO 4318, Surface active agents and soaps - Determination Determination of matter extractable by light pet- of water content -- Azeotropic distillation method. roleum. ., Surface active agents - Determination of sulphate ISO. Determination of sodium alkylaryisulphonates con- content - . Titrimetric method.2) tent. Determination of sodium sulphite content. 4 SAMPLING Determination of sodium sulphate content. Prepare and store a laboratory sample of approximately Determination of sodium chloride content. 300 g acc