BS EN ISO 9562-2004 Water quality - Determination of adsorbable organically bound halogens (AOX)《水质 可吸附卤素(AOX)的测定》.pdf

1、BRITISH STANDARD BS EN ISO 9562:2004 Water quality Determination of adsorbable organically bound halogens (AOX) The European Standard EN ISO 9562:2004 has the status of a British Standard ICS 13.060.50 BS EN ISO 9562:2004 This British Standard was published under the authority of the Standards Polic

2、y and Strategy Committee on 29 September 2004 BSI 29 September 2004 ISBN 0 580 44513 5 National foreword This British Standard is the official English language version of EN ISO 9562:2004. It is identical with ISO 9562:2004. It supersedes BS EN 1485:1997 which is withdrawn. The UK participation in i

3、ts preparation was entrusted by Technical Committee EH/3, Water quality, to Subcommittee EH/3/2, Physical, chemical and biochemical methods, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The Bri

4、tish Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards On

5、line. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the respons

6、ible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover

7、, the EN title page, the EN foreword page, the ISO title page, pages ii to v, a blank page, pages 1 to 21 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORM

8、EEUROPENNE EUROPISCHENORM ENISO9562 September2004 ICS13.060.50 SupersedesEN1485:1996 Englishversion WaterqualityDeterminationofadsorbableorganicallybound halogens(AOX)(ISO9562:2004) QualitdeleauDosagedescompossorganiques halognsadsorbables(AOX)(ISO9562:2004) WasserbeschaffenheitBestimmungabsorbierba

9、rer organischgebundenerHalogene(AOX)(ISO9562:2004) ThisEuropeanStandardwasapprovedbyCENon2September2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliogra

10、phicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtot

11、heCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slov

12、enia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO9562:200

13、4:E I NESO 59:2602( 40E) 2 Foreword This document (EN ISO 9562:2004) 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 held by DIN. This European Standard shall be given the status of

14、 a national standard, either by publication of an identical text or by endorsement, at the latest by March 2005, and conflicting national standards shall be withdrawn at the latest by March 2005. This document supersedes EN 1485:1996. According to the CEN/CENELEC Internal Regulations, the national s

15、tandards 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

16、, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 9562:2004 has been approved by CEN as EN ISO 9562:2004 without any modifications. ENISO9562:2004 Reference number ISO 9562:2004(E) OSI 4002INTERNATIONAL STANDARD ISO 9562 Third edition 2004-09-15

17、Water quality Determination of adsorbable organically bound halogens (AOX) Qualit de leau Dosage des composs organiques halogns adsorbables (AOX) ENISO9562:2004IS:2659 O4002(E) DPlcsid Fremia ihTs PDF file may ctnoian emdebt dedyfepcaes. In ccaocnadrw eith Aebods licensilop gnic,y this file mairp eb

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21、o na ybm ynae,s lecetrinoc ro mecinahcal, inclidung tohpcoiypodna gn micrfoilm, wittuoh repmissii non writign from ietI rehSa Ot tsserdda eh ebolw or ISOs memreb i ydobn the cnuotrfo y ttseuqer ehe.r ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 7

22、4 E-mail coirypthgiso.o gr We bwww.is.o gro Pulbisdehi n Switlrez dnaii ISO 4002 Allr ithgsr esedevrENISO9562:2004IS:2659 O4002(E) I SO 4002 All irthgs ersedevr iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Terms and definitions. 1 4 Interferences 2 5 Principle .

23、 2 6 Reagents 2 7 Apparatus. 4 8 Sampling and sample pre-treatment. 6 9 Procedure. 7 10 Calculation. 11 11 Precision 11 12 Test report 12 Annex A (informative) Determination of dissolved adsorbable organically bound halogens after solid phase extraction (SPE-AOX) in waters with high salt content . 1

24、3 Annex B (informative) Handling of activated carbon 18 Annex C (informative) Statistical performance characteristics . 19 Bibliography . 21 ENISO9562:2004IS:2659 O4002(E) iv I SO 4002 All irthgs ersedevrForeword ISO (the International Organization for Standardization) is a worldwide federation of n

25、ational 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 has been established has the right to be represented on that committee. Inter

26、national 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 electrotechnical standardization. International Standards are drafted in accordance with the

27、 rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by

28、 at least 75 % of the member bodies casting a vote. 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. ISO 9562 was prepared by Technical Committee ISO/

29、TC 147, Water quality, Subcommittee SC 2, Physical, chemical and biochemical methods. This third edition cancels and replaces the second edition (ISO 9562:1998), which has been technically revised. ENISO9562:2004IS:2659 O4002(E) I SO 4002 All irthgs ersedevr vIntroduction Adsorbable organically boun

30、d halogens (AOX) is an analytical convention. The result is a parameter used for water quality control purposes. It represents the sum of organically bound chlorine, bromine and iodine (but not fluorine) that can be adsorbed on activated carbon under specified conditions and, if the sample is not fi

31、ltered, includes that associated with suspended matter. The user should be aware that particular problems could require the specification of additional marginal conditions. ENISO9562:2004ENISO9562:2004INTENRATIONAL TSANDADR IS:2659 O4002(E)I SO 4002 All irthgs ersedevr 1Water quality Determination o

32、f adsorbable organically bound halogens (AOX) 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 use

33、r to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. IMPORTANT It is absolutely essential that tests conducted according to this International Standard be carried out by suitably qualified staff. 1 Scope This International Standard

34、specifies a method for the direct determination of an amount of usually 10 g/l in water of organically bound chlorine, bromine and iodine (expressed as chloride) adsorbable on activated carbon. This method is applicable to test samples (see 9.2) with concentrations of inorganic chloride ions of less

35、 than 1 g/l. Samples with higher concentrations are diluted prior to analysis. This method is also applicable to samples containing suspended solids where halogens are adsorbed onto the solid matter (e.g. insoluble halides). Filtration of the sample before analysis allows the separate determination

36、of dissolved and particulate adsorbable organically bound halogens (AOX). Filtered samples with high inorganic chloride content can be analysed by a modified method dissolved adsorbable organically bound halogens after solid phase extraction in waters with high salt content (SPE- AOX) (see Annex A).

37、 However, results obtained by this modified method can differ significantly from those of the required method. 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 reference

38、s, the latest edition of the referenced document (including any amendments) applies. ISO 1773:1997, Laboratory glassware Narrow-necked boiling flasks ISO 3696:1987, Water for analytical laboratory use Specification and test methods 3 Terms and definitions For the purpose of this document, the follow

39、ing terms and definitions apply. 3.1 adsorbable organically bound halogens AOX equivalent amount of chlorine, bromine, and iodine contained in organic compounds, expressed as chloride when determined according to this International Standard ENISO9562:2004IS:2659 O4002(E) 2 I SO 4002 All irthgs ersed

40、evr3.2 dissolved organic carbon DOC amount of organically bound carbon present in water originating from compounds passing through a membrane filter of 0,45 m pore size and including cyanate and thiocyanate 4 Interferences 4.1 High AOX values can result from the presence of active chlorine and of so

41、me inorganic bromine and iodine compounds, irreversibly bound to activated carbon. Reactions of these oxidizing agents with organic substances in the sample and with the activated carbon can be prevented by the addition of sodium sulfite, immediately after sampling. 4.2 Organic bromine and iodine co

42、mpounds may, during combustion, decompose to elemental bromine or iodine respectively and this can yield higher oxidation states of these elements. These fractions of AOX may be incompletely determined, thus leading to negative bias. 4.3 Samples containing living cells (for example microorganisms or

43、 algae) may give rise to high results because of their chloride content. In these cases, the sample is not analysed until at least 8 h after acidification. 4.4 For samples with high chloride concentrations (approximately 1 g/l), the shaking procedure (9.3.2) can result in higher interferences than t

44、he column procedure (9.3.4). 4.5 Alcohols, aromatic compounds, or carboxylic acids may give rise to negative bias (e.g. in case of DOC values 100 mg/l). 4.6 For samples containing suspended solids, the stirring method (9.3.3) may lead to an insufficient covering of the particles. If the particles co

45、ntain substances contributing to the AOX, the shaking or column method is recommended. 4.7 The recovery of some polar and hydrophilic compounds, such as monochloroacetic acid, is incomplete. 5 Principle Acidification of the water sample with nitric acid. Adsorption of organic compounds contained in

46、the sample onto activated carbon, either by a shaking procedure, a stirring procedure, or by column adsorption. Displacement of inorganic halides by rinsing the activated carbon with sodium nitrate solution acidified with nitric acid. Combustion of the loaded carbon in an oxygen stream. Absorption o

47、f the hydrogen halides in an acceptor solution followed by determination of the halide ions by an argentometric titration, such as microcoulometry. Expression of the result as the mass concentration of chloride. 6 Reagents Use only reagents of recognized analytical grade. The purity of water, reagen

48、ts and gases shall be confirmed. The AOX content shall be negligible when compared with the lowest AOX content to be determined. The overall AOX content of water, chemicals and gases can be checked by measuring the total blank (10.2). 6.1 Water, Grade 1 as specified in ISO 3696:1987. 6.2 Activated carbon, the handling of which is given in Annex B, for one of three procedures listed in 6.2.1 to 6.2.3. ENISO9562:2004IS:2659 O4002(E) I SO 4002 All irthgs ersedevr 3Several methods may be applied to determine