EN 872:2005

Water quality - Determination of suspended solids - Method by filtration through glass fibre filters

This European Standard describes a method for the determination of suspended solids in raw waters, waste waters and effluents by filtration through glass fibre filters. The lower limit of the determination is about 2 mg/l. No upper limit has been established. Water samples are not always stable which means that the content of suspended solids depends on storage time, means of transportation, pH value and other circumstances. Results obtained with unstable samples should be interpreted with caution.

Wasserbeschaffenheit - Bestimmung suspendierter Stoffe - Verfahren durch Abtrennung mittels Glasfaserfilter

Dieses Dokument legt ein Verfahren zur Bestimmung suspendierter Stoffe in Rohwasser, Abwasser und
Kläranlagenabläufen mittels Filtration über Glasfaserfilter fest. Die Nachweisgrenze des Verfahrens beträgt
etwa 2 mg/l. Es wurde keine obere Grenze festgelegt.
Wasserproben sind nicht immer stabil; daraus folgt, dass die Massenkonzentration an suspendierten Stoffen
von der Lagerzeit, der Transportart, dem pH-Wert und anderen Umständen abhängt. Ergebnisse von nicht
stabilen Proben werden mit Vorsicht interpretiert.
Aufschwimmendes Öl und andere nicht mischbare Stoffe stören die Bestimmung (siehe Anhang A).
Proben mit mehr als 1 000 mg/l an gelösten Stoffen können eine spezielle Behandlung (8.6) erfordern.
ANMERKUNG 1 Das Ergebnis der Bestimmung hängt zum Teil von der Filterart ab, siehe 5.2. Es sollte daher das zu
verwendende Filter festgelegt werden.
ANMERKUNG 2 Die Verteilung der Partikelgrößen in verschiedenen Proben kann in weiten Grenzen streuen. Es gibt
daher keine Korrelation zwischen mit verschiedenen Filtern erhaltenen Ergebnissen, und es kann kein Umrechnungsfaktor
von den Ergebnissen mit einem Filter auf Ergebnisse mit anderen Filtern angegeben werden.

Qualité de l'eau - Dosage des matières en suspension - Méthode par filtration sur filtre en fibres de verre

Le présent document décrit une méthode de dosage des matières en suspension dans les eaux brutes, les eaux usées et les effluents, par filtration sur filtre en fibres de verre. La limite inférieure de dosage est d'environ 2 mg/l. Il n'a été fixé aucune limite supérieure.
Les échantillons d'eau ne sont pas toujours très stables, c'est-à-dire que leur teneur en matières en suspension dépend de la durée de conservation, des moyens de transport, du pH et d'autres circonstances. Il est recommandé d'interpréter avec précaution les résultats obtenus à partir d'échantillons instables.
La présence d'huile ou de tout autre liquide organique non miscible interfère (voir Annexe A).
Les échantillons contenant plus de 1 000 mg/l de matières dissoutes peuvent nécessiter un traitement particulier (voir 8.6).
NOTE 1   Le résultat du dosage dépend dans une certaine mesure du type de filtre utilisé (voir 5.2). Il est donc recommandé que le type de filtre soit spécifié.
NOTE 2   La distribution granulométrique des particules peut être très variable d'un échantillon à l'autre. Il n'y a donc aucune corrélation entre les résultats obtenus avec des filtres de porosité différente ; aucun facteur de conversion des résultats obtenus avec différents types de filtre ne peut être fourni.

Kakovost vode - Določevanje suspendiranih snovi - Metoda s filtracijo skozi filtre iz steklenih vlaken

General Information

• Status: Published
• Publication Date: 08-Feb-2005
• ICS: 13.060.60 - Examination of physical properties of water
• Technical Committee: CEN/TC 230 - Water analysis
• Drafting Committee: CEN/TC 230 - Water analysis
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Completion Date: 09-Feb-2022
• Ref Project: SIST EN 872:2005 - Water quality - Determination of suspended solids - Method by filtration through glass fibre filters

Relations

• Replaces: EN 872:1996 - Water quality - Determination of suspended solids - Method by filtration through glass fibre filters
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2005
1DGRPHãþD
SIST EN 872:1997
.DNRYRVWYRGH'RORþHYDQMHVXVSHQGLUDQLKVQRYL±0HWRGDVILOWUDFLMRVNR]LILOWUH
L]VWHNOHQLKYODNHQ
Water quality - Determination of suspended solids - Method by filtration through glass
fibre filters
Wasserbeschaffenheit - Bestimmung suspendierter Stoffe - Verfahren durch Abtrennung
mittels Glasfaserfilter
Qualité de l'eau - Dosage des matieres en suspension - Méthode par filtration sur filtre
en fibres de verre
Ta slovenski standard je istoveten z: EN 872:2005
ICS:
13.060.60 Preiskava fizikalnih lastnosti Examination of physical
vode properties of water
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 872
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2005
ICS 13.060.30 Supersedes EN 872:1996
English version
Water quality - Determination of suspended solids - Method by
filtration through glass fibre filters
Qualité de l'eau - Dosage des matières en suspension - Wasserbeschaffenheit - Bestimmung suspendierter Stoffe -
Méthode par filtration sur filtre en fibres de verre Verfahren durch Abtrennung mittels Glasfaserfilter
This European Standard was approved by CEN on 17 December 2004.

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 872:2005: E
worldwide for CEN national Members.

Contents
Page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Principle.4
5 Apparatus .5
6 Reagents.5
7 Sampling and sample handling.6
8 Procedure .6
9 Control .7
10 Calculation and report.7
11 Precision.7
Annex A (informative) Samples containing oil or other organic liquids.9
Bibliography .10

Foreword
This document (EN 872:2005) has been prepared by Technical Committee CEN/TC 230 “Water analysis”, the
secretariat of which is held by DIN.
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 August 2005, and conflicting national standards shall be withdrawn at the latest by
August 2005.
This document supersedes EN 872:1996.
WARNING — Persons using this document should be familiar with normal laboratory practice. This
document does not purport to address all of the safety problems, if any, associated with its use. It is the
responsibility of the user to establish appropriate safety and health practices and to ensure compliance
with any national regulatory conditions.
The evacuation of large glass vessels can cause dangerous implosions if the vessel is damaged by
scratches etc. It should be ensured that the relevant safety precautions have been observed.
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 document describes a method for the determination of suspended solids in raw waters, waste waters and
effluents by filtration through glass fibre filters. The lower limit of the determination is about 2 mg/l. No upper limit has
been established.
Water samples are not always stable which means that the content of suspended solids depends on storage time,
means of transportation, pH value and other circumstances. Results obtained with unstable samples need to be
interpreted with caution.
Floating oil and other immiscible organic liquids will interfere (see Annex A).
Samples containing more than about 1 000 mg/l of dissolved solids can require special treatment (8.6).
NOTE 1 The result of the determination depends to some extent on the type of filter used (5.2). It is therefore recommended
that the type of filter is specified.
NOTE 2 The size distribution of particles in different samples can vary widely. Therefore there is no correlation between
results obtained with filters of different pore width and no conversion factor can be given for the conversion of results obtained
with one type of filter to another.
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 25667-2:1993, Water quality — Sampling — Part 2: Guidance on sampling techniques (ISO 5667-2:1991).
EN ISO 5667-3, Water quality — Sampling — Part 3: Guidance on the preservation and handling of samples
(ISO 5667-3:2003).
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
suspended solids
solids removed by filtration under specified conditions
3.2
dissolved solids
substances remaining, after filtration and evaporation to dryness of a sample, under specified conditions
[4.25.1 of ISO 6107-2:1997]
4 Principle
Using a vacuum or pressure filtration apparatus the sample is filtered through a glass fibre filter. The filter is then dried
at 105 °C ± 2 °C and the mass of the residue retained on the filter is determined by weighing.
5 Apparatus
5.1 Equipment for vacuum or pressure filtration, to accommodate the selected filters (5.2).
Equipment for membrane filtration can in most cases be used for other types of filters. The plate supporting the filter
needs to have sufficient permeance to allow the water to pass freely.
5.2 Borosilicate glass fibre filters
5.2.1 The borosilicate filters shall satisfy the following criteria
 shall not contain any binders;
 shall be circular and of the appropriate diameter to fit the filtering device (5.1);
2 2
 shall comprise a mass per unit area of between 50 g/m and 100 g/m ;
 the loss of mass obtained in a blank test (5.2.2) shall be less than or equal to 0,017 mg/cm (for the more
common diameter of 47 mm, this corresponds to a loss of mass less than or equal to 0,3 mg).
5.2.2 Blank test
Check the loss of mass during filtration by running the procedure in Clause 8 but using 150 ml of distilled water
instead of the sample. Check each box or batch of filters separately. Carry out the test 3 times, selecting 3 filters at
random, to increase the sensitivity of the test.
NOTE To remove water-soluble constituents, the filters may be prewashed. Individual or a small number of filters (le
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