Water quality - Determination of anionic surfactants by measurement of the methylene blue index MBAS (ISO 7875-1:1984 modified)

Under the experimental conditions, sulfonates and sulfates are the compounds chiefly measured, but some positive and negative interferences can occur (see clause 10). The method is applicable to drinking water, surface water as well as waste water, e.g. for the determination of the primary degradation of surfactants being under investigation in test systems containing natural or synthetic waste water. This applies for both laboratory scaled and technical waste water treatment plants.

Wasserbeschaffenheit - Bestimmung von anionischen oberflächenaktiven Stoffen durch Messung des Methylenblau-Index MBAS (ISO 7875-1:1984 modifiziert)

Unter den Versuchsbedingungen werden hauptsächlich Sulfate und Sulfonate bestimmt, jedoch können einige Störungen (Unter- und Überbefunde) auftreten; siehe Abschnitt 10. Das Verfahren ist anwendbar auf Trinkwasser, Oberflächenwasser sowie Abwasser, z.B. zur Bestimmung der Primärabbaubarkeit von oberflächenaktiven Stoffen in Testsysteme, die natürliches oder synthetisches Abwasser enthalten.

Qualité de l'eau - Dosage des agents de surface anioniques par mesurage de l'indice au bleu de méthylene SABM (ISO 7815-1:1984 modifiée)

Dans les conditions expérimentales, les composés de type sulfonates et sulfates sont principalement mesurés mais des interférences positives et négatives peuvent se produire (voir chapitre 10). La méthode est applicable aux eaux destinées à la consommation humaine, aux eaux de surface et aux eaux résiduaires, par exemple pour la détermination de la dégradation primaire des agents de surface dans des systèmes d'essai contenant des eaux résiduaires synthétiques ou naturelles.

Kakovost vode - Določanje anionskih površinsko aktivnih snovi z metilen modrim MBAS (ISO 7875-1:1984, modificiran)

General Information

Status
Published
Publication Date
31-Jul-1997
ICS
13.060.50 - Examination of water for chemical substances
Technical Committee
KAV - Water quality
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Aug-1997
Due Date
01-Aug-1997
Completion Date
01-Aug-1997
Directive
Slovenian Regulation2014-01-3849 - Pravilnik o prvih meritvah in obratovalnem monitoringu odpadnih voda
 
Not HarmonizedTRRTP064 - Rules on initial measurements and operational monitoring of wastewater
Ref Project
EN 903:1993 - Water quality - Determination of anionic surfactants by measurement of the methylene blue index MBAS (ISO 7875-1:1984 modified)

Overview

SIST EN 903:1997 - Water Quality - Determination of Anionic Surfactants by Measurement of the Methylene Blue Index (MBAS) specifies a standardized method for detecting and quantifying anionic surfactants, particularly sulfonates and sulfates, in water samples. Utilizing the methylene blue active substances (MBAS) index, this method is applicable to a broad spectrum of water types, including drinking water, surface water, and waste water. Developed under the auspices of CEN, and aligned with ISO 7875-1:1984 (modified), this standard is pivotal for laboratories, regulators, and water treatment professionals involved in water quality monitoring and pollution control.

Key Topics

  • Anionic Surfactants Analysis: Focuses on identifying and quantifying substances such as sulfonates and sulfates that commonly exist in water due to detergents and other cleaning agents.
  • Methylene Blue Index (MBAS) Method: Describes the use of methylene blue reagent to selectively react with anionic surfactants, providing a measurable indicator of their concentration.
  • Applicability: The standard is suitable for various water samples, including:
    • Drinking water
    • Surface waters (rivers, lakes)
    • Industrial and municipal waste water
  • Interferences: Notes that certain compounds may interfere positively or negatively with test results, which is particularly important for accurate assessments (detailed in standard clause 10).
  • Testing Environments: Effective for both laboratory tests and operational monitoring at technical-scale water treatment plants.

Applications

SIST EN 903:1997 offers practical value across a range of water quality assessment and pollution control scenarios:

  • Regulatory Compliance: Ensures water quality meets environmental and public health standards by monitoring surfactant levels.
  • Waste Water Treatment Evaluation: Facilitates the analysis of primary degradation of surfactants in laboratory and full-scale waste water treatment plants, supporting process optimization and performance validation.
  • Environmental Monitoring: Provides baseline data for surface water pollution assessments and long-term aquatic ecosystem studies.
  • Industrial Effluent Testing: Assists industries in evaluating the effectiveness of their waste water treatment systems before discharge.
  • Drinking Water Quality Assurance: Supports utilities and municipalities in verifying the absence of harmful anionic surfactant residues in treated water supplies.

Related Standards

  • ISO 7875-1:1984: An international standard closely related to EN 903, providing the foundational methodology for the MBAS test.
  • ISO 7875-2: Specifies colorimetric method for the determination of anionic surfactants, offering complementary procedures.
  • EN ISO 5667: Series relating to the sampling of water, essential for ensuring consistent sample collection methods.
  • EN 872: Standard methods for suspended solids, often used in conjunction with surfactant analyses for comprehensive water quality assessments.

By following SIST EN 903:1997, laboratories and water authorities can reliably monitor anionic surfactants, support compliance with environmental regulations, and safeguard water quality for a variety of human and ecological needs. The MBAS approach remains a widely recognized, robust technique in modern water analysis.

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Frequently Asked Questions

SIST EN 903:1997 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Water quality - Determination of anionic surfactants by measurement of the methylene blue index MBAS (ISO 7875-1:1984 modified)". This standard covers: Under the experimental conditions, sulfonates and sulfates are the compounds chiefly measured, but some positive and negative interferences can occur (see clause 10). The method is applicable to drinking water, surface water as well as waste water, e.g. for the determination of the primary degradation of surfactants being under investigation in test systems containing natural or synthetic waste water. This applies for both laboratory scaled and technical waste water treatment plants.

Under the experimental conditions, sulfonates and sulfates are the compounds chiefly measured, but some positive and negative interferences can occur (see clause 10). The method is applicable to drinking water, surface water as well as waste water, e.g. for the determination of the primary degradation of surfactants being under investigation in test systems containing natural or synthetic waste water. This applies for both laboratory scaled and technical waste water treatment plants.

SIST EN 903:1997 is classified under the following ICS (International Classification for Standards) categories: 13.060.50 - Examination of water for chemical substances. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 903:1997 is associated with the following European legislation: EU Directives/Regulations: 2014-01-3849, TRRTP064. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

SIST EN 903:1997 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-avgust-1997
.DNRYRVWYRGH'RORþDQMHDQLRQVNLKSRYUãLQVNRDNWLYQLKVQRYL]PHWLOHQPRGULP
0%$6 ,62PRGLILFLUDQ
Water quality - Determination of anionic surfactants by measurement of the methylene
blue index MBAS (ISO 7875-1:1984 modified)
Wasserbeschaffenheit - Bestimmung von anionischen oberflächenaktiven Stoffen durch
Messung des Methylenblau-Index MBAS (ISO 7875-1:1984 modifiziert)
Qualité de l'eau - Dosage des agents de surface anioniques par mesurage de l'indice au
bleu de méthylene SABM (ISO 7815-1:1984 modifiée)
Ta slovenski standard je istoveten z: EN 903:1993
ICS:
13.060.50 3UHLVNDYDYRGHQDNHPLþQH Examination of water for
VQRYL chemical substances
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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