1、November 2016 English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 13.060.60!%ut“2588281www.din.de
2、DIN EN ISO 7027-1Water quality Determination of turbidity Part 1: Quantitative methods (ISO 70271:2016);English version EN ISO 70271:2016,English translation of DIN EN ISO 7027-1:2016-11Wasserbeschaffenheit Bestimmung der Trbung Teil 1: Quantitative Verfahren (ISO 70271:2016);Englische Fassung EN IS
3、O 70271:2016,Englische bersetzung von DIN EN ISO 7027-1:2016-11Qualit de leau Dtermination de la turbidit Partie 1: Mthodes quantitatives (ISO 70271:2016);Version anglaise EN ISO 70271:2016,Traduction anglaise de DIN EN ISO 7027-1:2016-11Partially supersedesDIN EN ISO 7027:200004www.beuth.deDocument
4、 comprises 18 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.11.16 DIN EN ISO 7027-1:2016-11 2 A comma is used as the decimal marker. National foreword This document (EN ISO 7027-1:2016) has been prepared by Technical Committe
5、e ISO/TC 147 “Water quality” in collaboration with Technical Committee CEN/TC 230 “Water analysis” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Wasserwesen (DIN Standards Committee Water Practice), Working Committee NA 119-01-03 AA Wass
6、eruntersuchung. ISO 7027 consists of the following parts under the general title Water quality Determination of turbidity: Part 1: Quantitative methods The following part is under preparation: Part 2: Semi-quantitative methods Designation of the method: Determination of turbidity Part 1: Quantitativ
7、e methods (C 21): Method DIN EN ISO 7027-1 C 21 The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 5667-3 DIN EN ISO 5667-3 ISO 5725-1 DIN ISO 5725-1 ISO 5725-2 DIN ISO 5725-2 DIN EN ISO 7027-1:2016-11 3 Expert assistance and specialized l
8、aboratories will be required to perform the analyses described in this standard. Existing safety requirements are to be observed. Depending on the objective of the analysis, a check shall be made on a case-by-case basis as to whether and to what extent additional conditions will have to be specified
9、. This standard has been prepared by DIN-Normenausschuss Wasserwesen (DIN Standards Committee Water Practice) in collaboration with the Wasserchemische Gesellschaft - Fachgruppe in der Gesellschaft Deutscher Chemiker (Water Chemistry Society Division of the German Chemical Society). It is part of th
10、e series Deutsche Einheitsverfahren zur Wasser-, Abwasser- und Schlammuntersuchung (German standard methods for the examination of water, waste water and sludge): Determination of turbidity Part 1: Quantitative methods (C 21) Standard methods published as DIN Standards are obtainable from Beuth Verl
11、ag GmbH, either individually or grouped in volumes. The standard methods included in the loose-leaf publication entitled Deutsche Einheitsverfahren zur Wasser-, Abwasser- und Schlammuntersuchung will continue to be published by Beuth Verlag GmbH and Wiley-VCH Verlag GmbH b) the semi-quantitative met
12、hods using the transparency testing tube and the transparency testing disk have been transferred to DIN EN ISO 7027-2; c) the standard has been editorially and technically revised to bring it into line with current technical developments. Previous editions DIN EN 27027: 1994-03 DIN EN ISO 7027: 2000
13、-04 National Annex NA (informative) Bibliography DIN ISO 5725-1, Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions DIN ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determina
14、tion of repeatability and reproducibility of a standard measurement method DIN EN ISO 5667-3, Water quality Sampling Part 3: Preservation and handling of water samples EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7027-1 June 2016 ICS 13.060.60 Supersedes EN ISO 7027:1999English Version W
15、ater quality Determination of turbidity Part 1: Quantitative methods (ISO 7027-1:2016) Qualit de leau Dtermination de la turbidit Partie 1: Mthodes quantitatives (ISO 7027-1:2016) Wasserbeschaffenheit Bestimmung der Trbung Teil 1: Quantitative Verfahren (ISO 7027-1:2016) This European Standard was a
16、pproved by CEN on 15 April 2016. 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 nation
17、al standards may be obtained on application to the CEN-CENELEC Management Centre 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 languag
18、e and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, H
19、ungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-C
20、ENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7027-1:2016 EEN ISO 7027-1:2016 (E) 2 Contents Page European foreword . 3 Foreword 4 Introduction 5 1 Scope 6 2 No
21、rmative references 6 3 Terms and definitions . 6 4 Sampling and samples . 7 5 Quantitative methods of turbidity measurement using optical nephelometers and turbidimeters . 7 5.1 General principles . 7 5.2 Reagents . 8 5.3 Measurement of diffuse radiation (nephelometry) . 10 5.4 Measurement of attenu
22、ated radiation (turbidimetry) . 10 Annex A (informative) Results of an interlaboratory collaborative trial to evaluate the suitability of a synthetic polymer for use as a secondary standard to formazin in turbidity measurements 12 A.1 General . 12 A.2 Verification procedure for a proven secondary st
23、andard . 13 Bibliography . 14 DIN EN ISO 7027-1:2016-11 EN ISO 7027-1:2016 (E) 3 European foreword This document (EN ISO 7027-1:2016) has been prepared by Technical Committee ISO/TC 147 “Water quality” in collaboration with Technical Committee CEN/TC 230 “Water analysis” the secretariat of which is
24、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 December 2016, and conflicting national standards shall be withdrawn at the latest by December 2016. This document supersedes EN ISO 70
25、27:1999. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards org
26、anizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg
27、, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 7027-1:2016 has been approved by CEN as EN ISO 7027-1:2016 without any modification. DIN EN ISO 7027-1:2016-11 ForewordISO (the I
28、nternational Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee
29、has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnica
30、l standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in a
31、ccordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. De
32、tails of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an
33、 endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee r
34、esponsible for this document is ISO/TC 147, Water quality, Subcommittee SC 2, Physical, chemical and biochemical methods.This first edition of ISO 7027-1, together with ISO 7027-2, cancels and replaces ISO 7027:1999, which has been technically revised. ISO 7027 consists of the following parts, under
35、 the general title Water quality Determination of turbidity: Part 1: Quantitative methodsThe following part is under preparation: Part 2: Semi-quantitative methods4EN ISO 7027-1:2016 (E) DIN EN ISO 7027-1:2016-11 IntroductionMeasurements of turbidity can be affected by the presence of dissolved ligh
36、t-absorbing substances (substances imparting colour). Such effects can be minimized, however, by performing measurements at wavelengths greater than 800 nm. Only carbon black and a blue colour, which can be found in certain polluted waters, slightly affects measurements of turbidity in this region o
37、f the spectrum. Air bubbles can also interfere with measurements, but such interference can be minimized by careful handling of the samples.It is to be investigated whether and to what extent, particular problems will require the specification of additional marginal conditions.5 EN ISO 7027-1:2016 (
38、E) DIN EN ISO 7027-1:2016-11 WARNING Persons using this International Standard should be familiar with normal laboratory practice. This International Standard 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 ap
39、propriate safety and health practices and to ensure compliance with any national regulatory conditions.IMPORTANT It is absolutely essential that tests conducted in accordance with this International Standard be carried out by suitably qualified staff.1 ScopeThis part of ISO 7027 specifies two quanti
40、tative methods using optical turbidimeters or nephelometers for the determination of turbidity of water:a) nephelometry, procedure for measurement of diffuse radiation, applicable to water of low turbidity (for example drinking water);b) turbidimetry, procedure for measurement of the attenuation of
41、a radiant flux, more applicable to highly turbid waters (for example waste waters or other cloudy waters).Turbidities measured according to the first method are presented as nephelometric turbidity units (NTU). The results typically range between 0,05 NTU and 400 NTU. Depending on the instrument des
42、ign, it can also be applicable to waters of higher turbidity. There is numerical equivalence of the units NTU and formazin nephelometric unit (FNU).Turbidity measured by the second method is expressed in formazin attenuation units (FAU), results typically range between 40 FAU and 4 000 FAU.2 Normati
43、ve referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) app
44、lies.CIE Publication No. 17, International Lighting Vocabulary3 Terms and definitionsFor the purposes of this document, the terms and definitions given in CIE Publication No. 17 and the following apply.3.1turbidityreduction of transparency of a liquid caused by the presence of undissolved matter6EN
45、ISO 7027-1:2016 (E) DIN EN ISO 7027-1:2016-11 4 Sampling and samplesMaintain all containers that come into contact with the sample in a scrupulously clean condition. Wash with hydrochloric acid or surfactant cleaning solution.Collect samples in glass or plastics bottles and carry out the determinati
46、ons, as soon as possible after collection. If storage is unavoidable, store the samples in a cool, dark room but for not longer than 24 h. If the samples have been stored under cool conditions, allow them to come to room temperature before measurement. Prevent contact between the sample and air and
47、avoid unnecessary changes in the temperature of the sample.5 Quantitative methods of turbidity measurement using optical nephelometers and turbidimeters5.1 General principlesA water sample coloured by dissolved substances is a homogeneous system that only attenuates radiation passing through the sam
48、ple. A water sample containing undissolved substances attenuates the incident radiation and in addition the insoluble particles which are present diffuse the radiation unequally in all directions. The forward diffusion of radiation by the particles affects the attenuation so that the common spectral
49、 attenuation coefficient () is the sum of the spectral diffusion coefficient s() and the spectral absorption coefficient (): () () ()=+s (1)To obtain the spectral diffusion coefficient s() alone, the spectral absorption coefficient () needs to be known. In order to determine the spectral absorption coefficient of the dissolved substance, the undissolved substances can, in some cases, be removed by filtration, but this may
