6122 NTERNATIONAL STANDARD (ISO INTE RNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAH OPrAHW3ALUR IO CTAHAAPTW3ALWWORGANISATION INTE RNATIONALE DE NORMALISATION Surface active agents -- Technical alkane sulphonates Determination of total alkane sulphonates content Agents de surface -- Alcanesulfonates techniques -- Determination de la teneur en alcanesulfonates totaux First edition - 1978-08-15 Avsi Tnternct Doc Sect 1SO 6122-1978 (E) Ref. No. 1SO 6122-1978 (E) UDC 661.186.5 : 543.24 Descriptors : surfactants, alkane sulphonates, chemical analysis, determination of content, purity. Price based on 2 pages Copyright International Organization for Standardization from IHS Not for Resale 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 tiaison 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 Internationat Standards by the iso Council. International Standard ISO 6122 was developed by Technical Committee IsO/TC 91, Surface active agents, and was circulated to the member bodies in September 1977. It has been approved by the member bodies of the following countries : Australia India Romania Austria 1ran South Africa, Rep. of Beigium Italy Spain Brazil Japan Switzerland Kenya Bulgaria Turkey United Kingdom Chile Mexico U.S.A. France Netherlands Germany New Zealand U.S.S.R. Hungary Poland No member body expressed disapproval of the document. @ International Organization for Standardization, 1978 : Printed in Switzerland Copyright International Organization for Standardization sefrom IHS Not for Resale ISO 6122-1978 (E) INTERNATIONAL STANDARD Surface active agents - Technical alkane sulphonates - Determination of total alkane sulphonates content 1 SCOPE AND FIELD OF APPLICATION 5 REAGENTS This International Standard specifies a method for the deter- During the analysis, use only reagents of recognized ana mination of total alkane sulphonates content (mono-+ di-) lytical grade and only distilled water or water of equivalent of technical alkane sulphonates containing small quantities purity. of paraffins. 5.1 Acetone. It is applicable to all alkali metal salts of the products of sulphochlorination and sutphoxidation of paraffins. 5.2 Butan-1-ol and acetone mixture (60 + 40) (V, + V2). 2 REFERENCES 5.3 Sodium sulphate, anhydrous, 200 g/l solution. 1sO 607, Surface active agents and detergents - Methods of sample division. 1) 6 APPARATUS - Technical sodium primary Is0 894, Surface active agents - Ordinary aboratory apparatus and alkylsulphates-Methods of analysis. 6.1 Boiling flask or crystallizing dish, glass, 250 ml. 3 DEFINITION 6.2 Oven capable of being regulated at 120 ± 2 °c. For the purpose of this International Standard, the follow- ing definition applies : 6.3 Magnetic stirrer. alkane sulphonate : Alkali metal salt of the sulphonic acids present in the products of sulphochlorination and sulph- 7 SAMPLING oxidation of pure straight-chain paraffins of which the chain consists of between 12 and 20 carbon atoms. The laboratory sample shall be prepared and stored according to the instructions given in ISO 607. 4 PRINCIPLE 8 PROCEDURE Dispersion of a test portion of the technical alkane sulpho- nate in a sodium sulphate solution, and addition of a 8.1 Test portion mixture of butan-1-ol and acetone to precipitate sodium sulphate decahydrate and part of the sodium chloride. Weigh, to the nearest 0,001 g, into a 250 ml conical flask, a test portion which contains about 0,5 to 1 g of total Filtration to obta