1、April 2012 Translation by DIN-Sprachendienst.English price group 12No 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
2、13.060.60!$Pe“1884566www.din.deDDIN EN ISO 7887Water quality Examination and determination of colour (ISO 7887:2011)English translation of DIN EN ISO 7887:2012-04Wasserbeschaffenheit Untersuchung und Bestimmung der Frbung (ISO 7887:2011)Englische bersetzung von DIN EN ISO 7887:2012-04Qualit de leau
3、Examen et dtermination de la couleur (ISO 7887:2011)Traduction anglaise de DIN EN ISO 7887:2012-04SupersedesDIN EN ISO 7887:1994-12www.beuth.deDocument comprises 22 pagesIn case of doubt, the German-language original shall be considered authoritative.03.12 DIN EN ISO 7887:2012-04 2 A comma is used a
4、s the decimal marker. National foreword This standard has been prepared by Technical Committee 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 the Normenausschuss
5、 Wasserwesen (Water Practice Standards Committee), Working Committee NA 119-01-03 AA Wasseruntersuchung. This standard is part of the series Deutsche Einheitsverfahren zur Wasser-, Abwasser- und Schlammuntersuchung Physikalische und physikalisch-chemische Kenngren (Gruppe C) (German standard methods
6、 for the examination of water, waste water and sludge Physical and physicochemical parameters (group C) and describes method C 1. Designation of the method: Examination and determination of colour (C 1) by visual examination (A), or using optical instruments (B), or using optical instruments for det
7、ermination of absorbance at wavelength = 410 nm (C), or by visual determination of the colour in natural water (D): e.g. Method DIN EN ISO 7887 C 1 A The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 3696 DIN ISO 3696 ISO 5667-3 DIN EN IS
8、O 5667-3 ISO 10523 DIN EN ISO 10523 Amendments This standard differs from DIN EN ISO 7887:1994-12 as follows: a) a new method “Method C: Determination of true colour using optical instruments for determination of absorbance at wavelength = 410 nm” has been included; b) precision data for selected ma
9、trices for the following methods have been included: method B, determination of true colour using optical instruments at wavelengths = 436 nm, = 525 nm and = 620 nm, method C, determination of true colour using optical instruments for determination of absorbance at wavelength = 410 nm, method D, vis
10、ual determination of the colour in natural water using a comparator; c) the standard has been editorially revised. Previous editions DIN 38404-1: 1976-12 DIN 38404-1: 1992-06 DIN EN ISO 7887: 1994-12 DIN EN ISO 7887:2012-04 3 Expert assistance and specialized laboratories will be required to perform
11、 the analysis described in this standard. Existing safety regulations are to be taken into account. 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. German standard methods for
12、the examination of water, waste water and sludge Standard methods published as DIN Standards are obtainable from Beuth Verlag GmbH, either individually or grouped in volumes. The standard methods included in the loose-leaf publication entitled Deutsche Einheitsverfahren zur Wasser-, Abwasser- und Sc
13、hlammuntersuchung will continue to be published jointly by Wiley-VCH Verlag and Beuth Verlag GmbH. All standard methods relevant to the Abwasserverordnung (Waste Water Regulation) (AbwV) included in the new Regulation on Section 57, paragraph 1, number 1, of the Gesetz zur Ordnung des Wasserhaushalt
14、es (German Water Management Act) concerning Anforderungen an das Einleiten von Abwasser in Gewsser together with the Abwasserverordnung and the Gesetz zur Ordnung des Wasserhaushalts have been published by Beuth Verlag GmbH as a loose-leaf collection Analysenverfahren in der Abwasserverordnung Recht
15、svorschriften und Normen (Supplements). Standards or draft standards bearing the group title “German standard methods for the examination of water, waste water and sludge” are classified under the following categories (main titles): General information (group A) (DIN 38402) Sensory analysis (group B
16、) (DIN 38403) Physical and physicochemical parameters (group C) (DIN 38404) Anions (group D) (DIN 38405) Cations (group E) (DIN 38406) Substance group analysis (group F) (DIN 38407) Gaseous constituents (group G) (DIN 38408) Parameters characterizing effectsand substances (group H) (DIN 38409) Biolo
17、gical-ecological methods of analysis (group M) (DIN 38410) Microbiological methods (group K) (DIN 38411) Test methods using water organisms (group L) (DIN 38412) Individual constituents (group P) (DIN 38413) Sludge and sediments (group S) (DIN 38414) Bio-assays with microorganisms (group T) (DIN 384
18、15) In addition to the methods described in the DIN 38402 to DIN 38415 series of standards, there are a number of European and International Standards available as DIN EN, DIN EN ISO and DIN ISO Standards, which also form part of the collection of German standard methods. Information on Parts of the
19、se series of standards that have already been published can be obtained from the offices of the Normenausschuss Wasserwesen, telephone +49 30 2601-2448, or from Beuth Verlag GmbH, Burggrafenstr. 6, 10787 Berlin. )Registered in the DITR database of DIN Software GmbH, obtainable from: Beuth Verlag Gmb
20、H, 10772 Berlin. DIN EN ISO 7887:2012-04 4 National Annex NA (informative) Bibliography DIN EN ISO 5667-3, Water quality Sampling Part 3: Guidance on the preservation and handling of water samples DIN EN ISO 10523, Water quality Determination of pH DIN ISO 3696, Water for analytical laboratory use S
21、pecification and test methods EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7887 December 2011 ICS 13.060.60 Supersedes EN ISO 7887:1994English Version Water quality - Examination and determination of colour (ISO 7887:2011) Qualit de leau - Examen et dtermination de la couleur (ISO 7887:2
22、011) Wasserbeschaffenheit - Untersuchung und Bestimmung der Frbung (ISO 7887:2011) This European Standard was approved by CEN on 14 December 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of
23、a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national 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).
24、 A version in any other language made by translation under the responsibility of a CEN member into its own language 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, Cy
25、prus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION
26、COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7887:2011: EContents Page Foreword . 3 1 Scope 4 2 Normativ
27、e references 4 3 Terms and definitions . 5 4 Method A: Visual examination . 5 5 Method B: Determination of the true colour using optical instruments 6 6 Method C: Determination of true colour using optical instruments for determination of absorbance at wavelength 410 nm 8 7 Method D: Visual method f
28、or the determination of the colour in natural water . 12 8 Test report 13 Annex A (informative) Quality control 15 Annex B (informative) Precision data . 16 Bibliography 18 EN ISO 7887:2011 (E) DIN EN ISO 7887:2012-04 2Foreword This document (EN ISO 7887:2011) has been prepared by Technical Committe
29、e ISO/TC 147 “Water quality“ in collaboration with 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 June 201
30、2, and conflicting national standards shall be withdrawn at the latest by June 2012. 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. T
31、his document supersedes EN ISO 7887:1994. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
32、Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 7887:2011 has been approved by CEN as a EN ISO 7887:2011
33、without any modification. EN ISO 7887:2011 (E) DIN EN ISO 7887:2012-04 3 WARNING Persons using this International Standard should be familiar with normal laboratory practice. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibili
34、ty of the user to establish appropriate 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 Scope This Inte
35、rnational Standard specifies four different methods, designated A to D, for the examination of colour. The previously most employed method for assessment of water colour in water treatment plants, limnological surveys, etc. was based on the hexachloroplatinate scale (Reference 1). Methods C and D ar
36、e harmonized with this traditional procedure (References 23). Method A involves examination of apparent colour by visually observing a water sample in a bottle. This gives only preliminary information, for example for use in field work. Only the apparent colour can be reported. Method B involves det
37、ermination of the true colour of a water sample using optical apparatus and is applicable to raw and potable water and to industrial water of low colour. A subclause on interferences is included. Method C involves determination of the true colour of a water sample using optical apparatus for compari
38、son with hexachloroplatinate concentration at wavelength, 410 nm. A subclause on interferences is included. Method D involves determination of colour by visual comparison with hexachloroplatinate standard solutions and can be applied to raw and drinking water. A subclause on interferences is include
39、d. Methods A and B are appropriate if the colour hue of the sample differs from the hue of the matching solution. NOTE 1 Under certain circumstances, strongly coloured water samples require dilution before examination or determination. However, this can alter the physical-chemical conditions leading
40、 to a change in colour. NOTE 2 An internal quality control procedure for all methods specified in this International Standard is given in Annex A. Precision data are given in Annex B. When stating the result, the procedure used (methods A to D) is also recorded. 2 Normative references The following
41、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. ISO 3696, Water for analytical laboratory use Specification and
42、 test methods ISO 5667-3, Water quality Sampling Part 3: Preservation and handling of water samples ISO 10523, Water quality Determination of pH EN ISO 7887:2011 (E) DIN EN ISO 7887:2012-04 43 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 app
43、arent colour of water colour due to dissolved substances and undissolved suspended matter, determined in the original water sample without filtration or centrifugation 3.2 colour of water optical property that causes the changing of the spectral composition of transmitted visible light 3.3 dissolved
44、 organic carbon DOC sum of organically bound carbon present in water originating from compounds passing through a membrane filter of 0,45 m pore size, including cyanate and thiocyanate ISO 8245:1999,63.4 NOTE DOC in natural waters often originates from natgural organic matter (NOM), a complex mixtur
45、e of compounds formed as a result of the breakdown of animal and plant material in the environment. The composition of the mixture is strongly dependent on the environmental source. Spectroscopic methods are often used to characterize the dissolved organic matter in natural waters (Reference 4). The
46、 ratio of UV absorbance and DOC concentration (specific UV-absorption, SUVA) has proved to be useful for optimization of water treatment processes. 3.4 specific colour ratio between the true colour of a sample and its concentration of dissolved organic carbon 3.5 true colour of water colour due only
47、 to dissolved substances, determined after filtration of the water sample through a membrane filter of pore size 0,45 m 4 Method A: Visual examination 4.1 Sampling bottles Colourless bottle, see ISO 5667-3. Maintain all glassware that comes into contact with the sample in a scrupulously clean condit
48、ion by washing with hydrochloric acid c(HCI) 2 mol l1 or with surfactant cleaning solution which is recommended for laboratory use. Finally rinse with water for washing (5.4.2) and allow to drain. 4.2 Sampling and samples Collect samples in bottles (4.1) and carry out the colour test as soon as possible. If storage is unavoidable, the samples can be stored for up to 5 days in the dark
