ISO 2871-2-2010 PDF

Full title and description

Surface active agents — Detergents — Determination of cationic-active matter content — Part 2: Cationic-active matter of low molecular mass (between 200 and 500). This International Standard specifies a laboratory method for determining the content of low-molecular-mass cationic-active materials (monoamines, amine oxides, certain quaternary ammonium compounds and alkyl‑pyridinium salts) in solids and aqueous solutions when anionic and amphoteric surfactants are not present.

Abstract

ISO 2871-2:2010 defines a quantitative analytical procedure for low‑molecular‑mass cationic surfactants (molecular mass roughly 200–500). The method is suitable for solids and aqueous solutions of the active material and is limited where anionic and/or amphoteric surface‑active agents are present (they interfere with the determination). The publication is the 2010 (second) edition of Part 2.

General information

• Status: Published (International Standard, confirmed by ISO review cycle).
• Publication date: February 2010 (2010-02).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 71.100.40 (Surface active agents, detergents).
• Edition / version: Edition 2 (2010).
• Number of pages: 6 (ISO bibliographic record).

Scope

Specifies a laboratory titrimetric determination for cationic-active matter of low molecular mass (approx. 200–500 g·mol−1) typically found in certain detergent formulations. The method applies to both solid samples and aqueous solutions of the active material and is not intended for samples containing significant amounts of anionic or amphoteric surfactants which will interfere with the procedure. The standard provides required reagents, apparatus, sampling, detailed procedure, expression of results and test reporting.

Key topics and requirements

• Definition and applicable range for low‑molecular‑mass cationic-active substances (approx. 200–500 g·mol−1).
• Required reagents and preparation of standard solutions and indicators.
• Sampling and sample preparation for solids and aqueous samples.
• Titrimetric determination procedure (classic two‑phase titration approach is historically used for cationic surfactants; colour‑change end‑point systems based on dye displacement are described in related procedures).
• Calculation and expression of results (reporting units, considerations when molecular mass must be taken into account).
• Limitations and interferences — presence of anionic or amphoteric surface active agents precludes use of this method.

Typical use and users

Laboratories performing quality control and composition testing of detergents, formulators and manufacturers of surfactant products, regulatory and compliance labs checking product labelling and concentration claims, and research groups analyzing cationic surfactant fractions in formulations. The method is typically used where a robust, repeatable titrimetric determination of low‑molecular‑mass cationic actives is required.

Related standards

ISO 2871 is a multipart series. The closely related Part 1 (ISO 2871-1:2010) covers determination of high‑molecular‑mass cationic‑active matter; the two parts together address different molecular‑weight ranges of cationic surfactants. National and regional adoptions (e.g., EN/BS versions) implement the same method text for use in local conformity and procurement contexts.

Keywords

cationic surfactant, cationic-active matter, detergent analysis, titration, two‑phase titration, surfactant determination, ISO 2871, low molecular mass, quality control.

FAQ

Q: What is this standard?

A: ISO 2871-2:2010 is the International Standard that specifies a laboratory method for determining the content of low‑molecular‑mass cationic‑active materials in detergents and related products.

Q: What does it cover?

A: It covers scope, reagents, apparatus, sampling, step‑by‑step titrimetric procedure, calculation of results and reporting for cationic surfactants with molecular mass between about 200 and 500, and notes limitations when anionic or amphoteric surfactants are present.

Q: Who typically uses it?

A: Analytical and QC laboratories in the detergent and surfactant industry, product formulators, regulatory testing bodies and researchers needing a standardized method for quantifying low‑molecular‑mass cationic surfactants.

Q: Is it current or superseded?

A: The 2010 edition (Edition 2) is the published, confirmed version of Part 2 (it replaced the 1990 edition). ISO periodically reviews standards; according to ISO records this edition has been maintained through ISO's review cycle. For the absolute current status always check the ISO bibliographic record or your national standards body for any amendments or withdrawals.

Q: Is it part of a series?

A: Yes — ISO 2871 is a multipart series. Part 1 covers high‑molecular‑mass cationic‑active matter (ISO 2871‑1:2010) while Part 2 addresses low‑molecular‑mass cationic actives; the parts together provide methods for different molecular weight ranges.

Q: What are the key keywords?

A: Cationic surfactant, detergent analysis, titration, low molecular mass, ISO 2871, active matter content, two‑phase titration, quality control.