ISO 6842:1989
(Main)Surface active agents - Sulfated ethoxylated alcohols and alkylphenols - Determination of total active matter content
Surface active agents - Sulfated ethoxylated alcohols and alkylphenols - Determination of total active matter content
A test portion is boiled under reflux with ethanol in the presence of sodium sulphate. The solution is filtrated, the filtrate evaporated, and the residue weighed. Any sodium chloride present is determined by dissolution of the residue in aqueous acetone and titration with a standard volumetric silver nitrate solution. The mass of the residue is corrected for the sodium chloride content.
Agents de surface — Sulfates d'alcools et d'alkylphénols éthoxylés — Détermination de la teneur en matière active totale
La présente Norme internationale prescrit une méthode pour la détermination de la teneur en matière active totale dans les produits de sulfatation d'alcools ou d'alkylphénols éthoxylés neutralisés et couramment commercialisés [sulfates d'alkyloxyéthylène (sulfates d'alcools éthoxylés) ou sulfates d'alkylphénoloxyéthylène (sulfates d'alkylphénol éthoxylés)]. La matière active totale comprend les fractions organiques solubles dans l'éthanol (alkyléthersulfates, alkylphényléthersulfates, polyglycolsulfates et fractions non ioniques).
General Information
- Status
- Published
- Publication Date
- 20-Sep-1989
- Technical Committee
- ISO/TC 91 - Surface active agents
- Drafting Committee
- ISO/TC 91 - Surface active agents
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 01-Nov-2024
- Completion Date
- 13-Dec-2025
Relations
- Effective Date
- 15-Apr-2008
Overview
ISO 6842:1989 specifies a laboratory method for determining the total active matter in neutralized commercial products from the sulfation of ethoxylated alcohols and alkylphenols (e.g., alkyl ether sulfates and alkylphenol ether sulfates). The method measures the organic material soluble in ethanol and corrects the residue mass for any sodium chloride present after extraction. ISO 607 is referenced for sampling.
Key topics and procedure highlights
- Scope: Applies to sulfated ethoxylated alcohols and alkylphenols (ethoxylated alcohol sulfates and alkylphenol sulfates) and measures total active matter including non‑ionic fractions.
- Core principle: Boil a test portion under reflux with ethanol in the presence of sodium sulfate, filter the hot solution, evaporate the filtrate, weigh the residue, determine any NaCl present by dissolution in aqueous acetone and titration with silver nitrate, and correct the residue mass for sodium chloride.
- Typical reagents (as cited): ethanol (99%), dichloromethane, anhydrous sodium sulfate, 50% aqueous acetone, potassium chromate indicator, and a standardized silver nitrate volumetric solution (see the published standard for the exact declared concentration).
- Apparatus: 250 ml conical flask, condenser, rotary evaporator with 250 ml round‑bottom flasks, fast filter paper, precision balance and desiccator.
- Quality controls:
- Blank test performed in parallel.
- Drying to constant weight (consecutive weighings within 3 mg).
- Results expressed as % by mass: (residue mass corrected for NaCl / test portion mass) × 100.
- Precision data (interlaboratory): mean ≈ 58.67% total active matter; repeatability SD = 0.33; reproducibility SD = 0.94.
Applications
- Quality control and specification testing of surfactant raw materials and finished formulations containing sulfated ethoxylated alcohols and alkylphenols.
- Verification of total active matter declared on product data sheets for detergents, industrial cleaning agents, emulsifiers and related chemical products.
- Regulatory and procurement testing where an objective, repeatable analytical method is required.
Who should use ISO 6842
- Analytical chemists in detergent and surfactant manufacturing laboratories.
- QC/QA teams in chemical production and formulation facilities.
- Third‑party testing laboratories performing standard conformity checks.
- Procurement and regulatory bodies needing a harmonized method for active content verification.
Related standards
- ISO 607 (sampling and sample division for surface active agents and detergents) - used for laboratory sample preparation prior to analysis.
For precise reagent concentrations, handling details and the official formula, consult the published ISO 6842:1989 document. Keywords: ISO 6842, surface active agents, total active matter, sulfated ethoxylated alcohols, alkylphenols, surfactant analysis, silver nitrate titration, ethanol reflux.
ISO 6842:1989 - Surface active agents — Sulfated ethoxylated alcohols and alkylphenols — Determination of total active matter content Released:9/21/1989
ISO 6842:1989 - Agents de surface — Sulfates d'alcools et d'alkylphénols éthoxylés — Détermination de la teneur en matière active totale Released:9/21/1989
Frequently Asked Questions
ISO 6842:1989 is a standard published by the International Organization for Standardization (ISO). Its full title is "Surface active agents - Sulfated ethoxylated alcohols and alkylphenols - Determination of total active matter content". This standard covers: A test portion is boiled under reflux with ethanol in the presence of sodium sulphate. The solution is filtrated, the filtrate evaporated, and the residue weighed. Any sodium chloride present is determined by dissolution of the residue in aqueous acetone and titration with a standard volumetric silver nitrate solution. The mass of the residue is corrected for the sodium chloride content.
A test portion is boiled under reflux with ethanol in the presence of sodium sulphate. The solution is filtrated, the filtrate evaporated, and the residue weighed. Any sodium chloride present is determined by dissolution of the residue in aqueous acetone and titration with a standard volumetric silver nitrate solution. The mass of the residue is corrected for the sodium chloride content.
ISO 6842:1989 is classified under the following ICS (International Classification for Standards) categories: 71.100.40 - Surface active agents. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 6842:1989 has the following relationships with other standards: It is inter standard links to ISO 6842:1983. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 6842:1989 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
ISO
INTERNATIONAL
STANDARD
Second edition
1989-10-01
Surface active agents - Sulfated ethoxylated
alcohols and alkylphenols - Determination of
total active matter content
Agents de surface - Sulfa tes d’alcools et d’alkylph&ols 6 thox yks -
Mtermina tion de Ia teneur en ma ti&e active totale
Reference number
ISO 6842 : 1989 (E)
IsO6842:1989 (EI
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards bodies (ISO member bedies). The work of preparing International
Standards is normally carried out through ISO technical committees. Esch 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. ISO
collaborates closely with the International Electrotechnical Commission (IEC) on all
matters of electrotechnical standardization.
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.
Internati onal Standard ISO 6842 was prepared Technical Committee ISO/TC 91,
bY
Sudace ac tiie agen ts.
This second edition cancels and replaces the first edition (ISO 6842 : 19831, of which it
constitutes a minor revision.
0 ISO 1989
All rights reserved. Mo part of this publication may be reproduced or utilized in any form or by any
means, electronie or mechanical, including photocopying and microfilm, without Permission in
writing from the publisher.
International Organization for Standardization
Case postale 56 l CH-121 1 Geneve 20 o Switzerland
Printed in Switzerland
ISO 6842 : 1989 (E)
INTERNATIONAL STANDARD
Surface active agents - Sulfated ethoxylated alcohols
and alkylphenols - Determination of total active matter
content
1 Scope 4.3 Sodium sulfate, anhydrous.
This International Standard specifies a method for the deter-
4.4 Acetone, 50 % (WV) aqueous solution.
mination of the total active matter present in ordinary commer-
cial neutralized products of sulfation of ethoxylated alcohols or
4.5 Silver nitrate, Standard volumetric Solution,
alkylphenols [alkyl oxyethylene sulfates (ethoxylated alcohol
c(AgNO$ = 0,l mol/l.
sulfates) or alkylphenol oxyethylene sulfates (ethoxylated
alkylphenol sulfates)].
4.6 Potassium chromate, 100 g/l indicator Solution.
The total active matter comprises the organic material soluble
in ethanol (alkylether sulfates, alkylphenylether sulfates,
polyglycol sulfates and non-ionic fractions).
5 Apparatus
Ordinary laboratory apparatus and :
2 Normative reference
The following Standard contains provisions which, through
5.1 Conical flask, of capacity 250 ml, with a ground glass
reference in this text, constitute provisions of this International neck.
Standard. At the time of publication, the edition indicated was
valid. All Standards are subject to revision, and Parties to
5.2 Rotary evaporator, with round-bottomed flasks of
agreements based on this International Standard are encour-
capacity 250 ml.
aged to investigate the possibility of applying the most recent
edition of the Standard indicated below. Members of IEC and
5.3 Condenser, to fit the conical flask (5.1).
ISO maintain registers of currently valid International Stan-
dards.
ISO 607 : 1980, Surface active agents and detergents -
6 Sampling
Methods of Sample division.
The laboratory Sample of surface active agent shall be prepared
and stored in accordance with the requirements of ISO 607.
3 Principle
Boiling, under reflux, of a test Portion with ethanol in the
presence of sodium sulfate. Filtration, evaporation of the
7 Procedure
filtrate and weighing of the residue. Determination of any
sodium chloride present, by dissolution of the residue in
aqueous acetone and titration with Standard volumetric silver 7.1 Test Portion
nitrate solution. Correction
...
ISO
NORME
INTERNATIONALE
Deuxième édition
1989-10-01
Agents de surface - Sulfates d’alcools et
d’alkylphénols éthoxylés - Détermination
de la teneur en matière active totale
akohols and alkylphenols -
agents - Sulfa ted e thox yla ted
Surface active
of total active matter content
Determina tion
Numéro de référence
ISO 6842 : 1989 (FI
ISO 6842 : 1989 (FI
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (comités membres de I’ISO). L’élaboration
des Normes internationales est en général confiée aux comités techniques de I’ISO.
Chaque comité membre intéressé par une étude a le droit de faire partie du comité
technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I’ISO participent également aux travaux. L’ISO col-
labore étroitement avec la Commission électrotechnique internationale (CEI) en ce qui
concerne la normalisation électrotechnique.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO. Les Normes internationales sont approuvées confor-
mément aux procédures de I’ISO qui requièrent l’approbation de 75 % au moins des
comités membres votants.
La Norme internationale ISO 6842 a été élaborée par le comité technique lSO/TC 91,
Agents de surface.
Cette deuxième édition annule et remplace la première édition (ISO 6842 : 1983), dont
elle constitue une révision mineure.
0 ISO 1989
Droits de reproduction réservés. Aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie et les microfilms, sans l’accord écrit de l’éditeur.
Organisation internationale de normalisation
Case postale 56 l CH-1211
Genève 20 l Suisse
Imprimé en Suisse
ISO 6842 : 1989 (F)
NORME INTERNATIONALE
Sulfates d’alcools et d’alkylphénols
Agents de surface -
Détermination de la teneur en matière active
éthoxylés -
totale
4.3 Sulfate de sodium, anhydre.
1 Domaine d’application
La présente Norme internationale prescrit une méthode pour la
4.4 Acétone, solution aqueuse à 50 % ( V/ V).
détermination de la teneur en matière active totale dans les pro-
duits de sulfatation d’alcools ou d’alkylphénols éthoxylés neu-
4.5 Nitrate d’argent, solution titrée,
tralisés et couramment commercialisés [sulfates d’alkyl-
c(AgNOs) = 0,l mol/l.
oxyéthylène (sulfates d’alcools éthoxylés) ou sulfates d’alkyl-
phénoloxyéthylène (sulfates d’alkylphénol éthoxylés)].
4.6 Chromate de potassium, solution d’indicateur à
La matière active totale comprend les fractions organiques
100 g/l.
solubles dans I’éthanol (alkyléthersulfates, alkylphényléther-
sulfates, polyglycolsulfates et fractions non ioniques).
5 Appareillage
2 Référence normative
Matériel courant de laboratoire, et notamment :
La norme suivante contient des dispositions qui, par suite de la
5.1 Fiole conique, de 250 ml de capacité, munie d’un col
référence qui en est faite, constituent des dispositions valables
rodé.
pour la présente Norme internationale. Au moment de la publi-
cation, l’édition indiquée était en vigueur. Toute norme est
sujette à révision et les parties prenantes des accords fondés
5.2 Évaporateur rotatif, avec ballons à fond rond de
sur la présente Norme internationale sont invitées à rechercher
250 ml de capacité.
la possibilité d’appliquer l’édition la plus récente de la norme
indiquée ci-après. Les membres de la CEI et de I’ISO possèdent
5.3 Réfrigérant, adaptable à la fiole conique (5.1).
le registre des Normes internationales en vigueur à un moment
donné.
ISO 607 : 1980, Agents de surface et détergents - Méthodes
6 Échantillonnage
de division d’un échantillon.
L’échantillon pour laboratoire d’agent de surface doit être
préparé et conservé conformément aux prescriptions de
3 Principe I’ISO 607.
Ébullition sous reflux d’une prise d’essai en solution dans I’étha-
nol, en présence de sulfate de sodium. Filtration, évaporation
7 Mode opératoire
du filtrat et pesée du résidu. Détermination du chlorure de
sodium éventuellement présent, par dissolution du résidu dans
une solution aqueuse d’acétone et titrage au moyen d’une solu- 7.1 Prise d’essai
tion titrée de nitrate d’argent. Correction de la masse du résid
...














Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...