Overview
EN ISO 6845:2003 outlines a standardized method for the determination of the mean relative molecular mass and content of alkane monosulfonates in technical alkane sulfonates. Published by CEN and identical to ISO 6845:1989, this European Standard provides an essential analytical procedure for characterizing and verifying surface active agents, crucial in various chemical industries. The method involves extraction, purification, and measurement steps to ensure accurate quantification of alkane monosulfonates, supporting both quality control and regulatory compliance.
Key Topics
- Scope: Applicable to alkali metal salts of technical alkane sulfonates, specifically those derived from sulfochlorination or sulfoxidation of paraffins and free from significant quantities of paraffin hydrocarbons.
- Test Method Summary:
- Dissolution of a sample in ethanol.
- Acidification with hydrochloric acid.
- Separation of alkane monosulfonic acids from other impurities (disulfonates, sulfate ions) by extraction with light petroleum.
- Removal of residual alkali using a cation-exchange column.
- Neutralization of the eluate, leading to the formation of sodium alkane monosulfonates.
- Drying and weighing of the resulting monosulfonates.
- Calculation of mean relative molecular mass and alkane monosulfonate content.
- Analytical Precision: The standardized procedure ensures repeatability and reproducibility, enabling consistent results across laboratories.
Applications
EN ISO 6845:2003 is highly relevant for:
- Manufacturers of Surfactants and Detergents: Verifying the quality and consistency of technical alkane sulfonates, a key ingredient in detergents and cleaning agents.
- Quality Control Laboratories: Standardizing the process for measuring molecular mass and content of surface active agents, supporting consistent product formulations.
- Research and Development: Characterizing new surfactant formulations or modifications, ensuring molecular mass and component content meet design specifications.
- Regulatory Compliance: Assisting organizations in demonstrating adherence to international standards for chemical substances, relevant for product certification and market access.
- Raw Material Suppliers: Ensuring the accurate labeling and quality assurance of bulk technical alkane sulfonates being supplied to downstream industries.
Related Standards
For comprehensive surface active agents analysis and quality assurance, consider referring to these related standards:
- ISO 607: Surface active agents and detergents - Methods of sample division.
- ISO 385-1: Laboratory glassware - Burettes - General requirements.
- ISO 8213: Chemical products for industrial use - Sampling techniques for liquid chemicals.
- ISO 4325: Surface active agents - Determination of alkali content.
- ISO 2271: Surface active agents - Determination of anionic-active matter by two-phase titration procedure.
Adopting EN ISO 6845:2003 as part of your laboratory testing or production control processes ensures high reliability in the quantification and quality assessment of technical alkane sulfonates, contributing to product safety, efficacy, and market acceptance in the surfactants industry.
Keywords: EN ISO 6845:2003, surface active agents, technical alkane sulfonates, alkane monosulfonate, molecular mass determination, CEN standard, surfactant analysis, detergent manufacturing, laboratory standardization, quality control, ISO 6845:1989.