SIST EN 14670:2005
(Main)Surface active agents - Sodium dodecyl sulfate - Analytical method
- Abstract
This European Standard specifies a method for the determination of the active content and molar mass of sodium dodecyl sulphate used as original titre for the titre determination of standard solutions for surface active agents titration.
NOTE These are used in the mixed indicator two-phase titration (e. g. ISO 2271) and in the potentiometric titration using a surface active agent sensitive electrode (e.g. EN 14480).
- Status
- Published
- Publication Date
- 31-Oct-2005
- Technical Committee
- KDS - Cosmetics, chemical disinfectants and surface active agents
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Nov-2005
- Due Date
- 01-Nov-2005
- Completion Date
- 01-Nov-2005
SIST EN 14670:2005 is a European Standard published by SIST and adopted from EN 14670:2005. It specifies an analytical method for determining the active content and molar mass of sodium dodecyl sulfate used as the original titre for standard solutions in surface active agents titration. The standard is intended for laboratories that prepare, check, or use titration standards for surface active agents.
What does SIST EN 14670:2005 specify?
SIST EN 14670:2005 specifies a laboratory method for sodium dodecyl sulphate when it is used as the original titre for standard solutions in surface active agents titration. In practice, it tells users how to measure the material’s active content and its average molar mass so the substance can be used reliably as a reference in titration work.
The document is organized in a practical test sequence:
| Annex | What it covers |
|---|---|
| Annex A | Typical gas chromatogram and suitable gas chromatography conditions |
| Annex B | Results of an inter-laboratory test used for precision data |
The main clauses cover scope, normative references, principle, reagents, apparatus, sampling and preparation, procedure, expression of results, precision, and test report.
What are the key requirements of SIST EN 14670:2005?
The core idea of SIST EN 14670:2005 is to determine the components that affect the purity of sodium dodecyl sulphate, then calculate the active content by difference. It also specifies a gas chromatography-based way to determine the average molar mass from the fatty alcohol distribution released after hydrolysis.
How the active content is established
Clause 3 defines the calculation route: measure water, sodium sulphate, and light-petroleum-extractable matter, then subtract these from 100 %. This matters because the result is used as a reference value for titration standards, so small impurities directly affect the concentration assigned to the solution.
How the molar mass is obtained
Clause 3 also states that the average molar mass is based on the C-chain distribution of fatty alcohols released after acidic hydrolysis. In practice, that means the laboratory must isolate the hydrolysis products, separate them by gas chromatography, and use the peak distribution to calculate the average molar mass.
What reagents and water quality are required
Clause 4 requires analytical-grade reagents checked for interference, and water complying with grade 3 of EN ISO 3696. The clause also points users to the reagent sets from EN 13267, ISO 6844, and ISO 894. This keeps the method consistent between laboratories and limits contamination that would distort a trace-level result.
What apparatus is needed
Clause 5 requires a gas chromatograph suitable for fused silica capillary columns and equipped with a flame ionization detector (FID). A capillary column with the separation characteristics shown in Annex A is required. For users, this means the GC setup must be able to separate the fatty alcohols cleanly enough for the distribution calculation.
How sampling and the test are carried out
Clause 6 requires sampling and sample preparation according to ISO 607. Clause 7 then assigns the measurement of water content, sodium sulphate content, and extractable matter to the referenced methods, and gives the extraction and hydrolysis sequence for the molar mass determination. The procedure also requires at least the separation quality shown in Annex A.
How results and quality are reported
Clause 8 gives the calculation approach for active content and average molar mass. Clause 9 explains repeatability and reproducibility and points to Annex B for the precision data. Clause 10 requires the test report to identify the sample, state the method used, report the results, and note any deviations or incidents that could have affected them.
What terms does SIST EN 14670:2005 define?
- Active content - the portion of sodium dodecyl sulphate remaining after subtracting water, sodium sulphate, and light-petroleum-extractable matter from 100 %.
- Average molar mass - the molar mass calculated from the relative distribution of the fatty alcohol chain lengths released after hydrolysis.
- Light petroleum extractable matter - the fraction removed by the light petroleum extraction step, used as a purity-related correction in the active content calculation.
- Flame ionization detector (FID) - the GC detector specified for measuring the fatty alcohol distribution.
- Repeatability limit, r - the maximum difference expected between two results from the same laboratory under the same conditions in most cases.
- Reproducibility limit, R - the maximum difference expected between results from different laboratories in most cases.
Who uses SIST EN 14670:2005?
SIST EN 14670:2005 is used by analytical laboratories, quality control teams, and manufacturers of surface active agents and detergents. It is relevant to anyone who needs to standardize titration solutions or verify the reference quality of sodium dodecyl sulphate. The note in the scope links it directly to mixed indicator two-phase titration and to potentiometric titration with a surface active agent sensitive electrode.
Which standards are used with SIST EN 14670:2005?
- EN 13267 - provides the water content method used in the active-content calculation.
- EN ISO 3696 - sets the water quality and laboratory-water specification used for the analysis.
- ISO 607 - covers sample division and preparation.
- ISO 894 - provides the method for determining extractable matter by light petroleum.
- ISO 6844 - provides the method for determining sodium sulphate content.
- EN 14480 - named in the scope as an example of a potentiometric titration method using a surface active agent sensitive electrode.
- ISO 2271 - named in the scope as an example of mixed indicator two-phase titration.
- EN 13273 - noted as an alternative method for determining unsulphated matter when an appropriate calibrant is available.
- prEN 14880 - named as an alternative reagent/method reference for sodium sulphate determination.
- ISO 5725-2 - used to evaluate the inter-laboratory test results in Annex B.
What does the SIST EN 14670:2005 document contain?
The document contains the full analytical workflow, from sample preparation through calculation and reporting. It includes a GC-based procedure, a formula-based calculation of active content, and a calculation of average molar mass from peak areas. Annex A gives a typical gas chromatogram and working GC conditions, while Annex B presents inter-laboratory precision data for the active-content and molar-mass work.
Relations
- Effective Date
- 25-Aug-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Refers
SIST EN 13267:2002 - Surface active agents - Determination of water content - Karl Fischer method - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
SIST EN 14670:2005 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Surface active agents - Sodium dodecyl sulfate - Analytical method". This standard covers: This European Standard specifies a method for the determination of the active content and molar mass of sodium dodecyl sulphate used as original titre for the titre determination of standard solutions for surface active agents titration. NOTE These are used in the mixed indicator two-phase titration (e. g. ISO 2271) and in the potentiometric titration using a surface active agent sensitive electrode (e.g. EN 14480).
This European Standard specifies a method for the determination of the active content and molar mass of sodium dodecyl sulphate used as original titre for the titre determination of standard solutions for surface active agents titration. NOTE These are used in the mixed indicator two-phase titration (e. g. ISO 2271) and in the potentiometric titration using a surface active agent sensitive electrode (e.g. EN 14480).
SIST EN 14670:2005 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.
SIST EN 14670:2005 has the following relationships with other standards: It is inter standard links to SIST ISO 607:1995, SIST ISO 894:1995, SIST EN 14960:2007, SIST EN 14391:2005, SIST EN 13267:2002, SIST EN ISO 3696:1998, SIST EN 471:2003+A1:2008, SIST EN ISO 3175-1:2013, SIST EN 14668:2005, SIST EN ISO 105-G02:1999/AC:2010, SIST EN ISO 105-G02:1999, SIST EN 14669:2005, SIST EN 14480:2004. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 14670:2005 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2005
Površinsko aktivne snovi – Natrijev dodecil sulfat – Analitska metoda
Surface active agents - Sodium dodecyl sulfate - Analytical method
Grenzflächenaktive Stoffe - Natriumdodecyulsulfat - Analysenverfahren
Agents de surface - Dodécylsulfate de sodium - Méthode d'analyse
Ta slovenski standard je istoveten z: EN 14670:2005
ICS:
71.100.40 Površinsko aktivna sredstva Surface active agents
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 14670
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2005
ICS 71.100.40
English version
Surface active agents - Sodium dodecyl sulfate - Analytical
method
Agents de surface - Dodécylsulfate de sodium - Méthode Grenzflächenaktive Stoffe - Natriumdodecyulsulfat -
d'analyse Analysenverfahren
This European Standard was approved by CEN on 19 May 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14670:2005: E
worldwide for CEN national Members.
Contents
Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Principle.4
4 Reagents.4
5 Apparatus .5
6 Sampling and preparation of the sample .5
7 Procedure .5
8 Expression of results.6
9 Precision.7
10 Test report .7
Annex A (informative) Typical gas chromatogram.8
Annex B (informative) Results of inter-laboratory test .9
Bibliography.10
Foreword
This European Standard (EN 14670:2005) has been prepared by Technical Committee CEN/TC 276 “Surface
active agents”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by December 2005, and conflicting national standards shall be withdrawn at the latest
by December 2005.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
1 Scope
This European Standard specifies a method for the determination of the active content and molar mass of sodium
dodecyl sulphate used as original titre for the titre determination of standard solutions for surface active agents
titration.
NOTE These are used in the mixed indicator two-phase titration (e. g. ISO 2271) and in the potentiometric titration using a
surface active agent sensitive electrode (e.g. EN 14480).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references,
only the edition cited applies. For undated references, the latest edition of the referenced document (including any
amendments) applies.
EN 13267, Surface active agents – Determination of water content – Karl Fischer method.
EN ISO 3696, Water for analytical laboratory use – Specification and test methods (ISO 3696:1987).
ISO 607, Surface active agents and detergents – Methods of sample division.
ISO 894, Surface active agents – Technical sodium primary alkylsulphates – Methods of analysis.
ISO 6844, Surface active agents – Determination of mineral sulfate content – Titrimetric method.
3 Principle
The water content, the sodium sulphate content and the extractable matter content by light petroleum of the test
sample are determined according to the methods respectively described in EN ISO 3696, ISO 894 and ISO 9844
and the active content is calculated by subtracting the water content, the sodium sulphate content and the content
of extractable matter by light petroleum from 100 %. For calculating the average molar mass of the sodium dodecyl
sulphate the fatty alcohols C to C released after acidic hydrolysis are isolated and the C-chain distribution is
10 14
determined by gas chromatography.
4 Reagents
During the analysis, unless otherwise specified, use only reagents of recognized analytical grade which have been
checked in advance as not interfering with the analytical results and water complying with grade 3 as defined in
EN ISO 3696 and in particular use.
a) for the determination of the water content, the reagents specified in EN 13267;
b) for the determination of the sodium sulphate content, the reagents specified in ISO 6844 (or prEN 14880). ;
c) for the determination of extractable matter content by light petroleum, the reagents specified in ISO 894.
5 Apparatus
Normal laboratory apparatus and the following:
5.1 Gas chromatograph, suitable for
...