1、BRITISH STANDARD BS EN ISO 16264:2004 BS 6068-2.78: 2002 Incorporating Amendment No. 1 to BS ISO 16264:2002 (renumbers the BS ISO as BS EN ISO 16264: 2004) Water quality Determination of soluble silicates by flow analysis (FIA and CFA) and photometric detection ICS 13.060.50 BS EN ISO 16264:2004 Thi
2、s British Standard, having been prepared under the direction of the Health and Environment Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 26 June 2002 BSI 24 March 2004 ISBN 0 580 39885 4 National foreword This British Standa
3、rd is the official English language version of EN ISO 16264:2004. It is identical with ISO 16264:2002. The UK participation in its 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
4、: A list of organizations represented on this subcommittee can be obtained on request to its secretary. BS ISO 16264 is one of a series of standards on water quality, others of which have been, or will be, published as Sections of BS 6068. This standard has therefore been given the secondary identif
5、ier BS 6068-2.78. The various Sections of BS 6068 are comprised within Parts 1 to 7, which, together with Part 0, are listed below. Part 0 Introduction Part 1 Glossary Part 2 Physical, chemical and biochemical methods Part 3 Radiological methods Part 4 Microbiological methods Part 5 Biological metho
6、ds Part 6 Sampling NOTE The tests described in this British Standard should only be carried out by suitably qualified persons with an appropriate level of chemical expertise. Standard chemical procedures should be followed throughout. Cross-references The British Standards which implement internatio
7、nal 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 British Standards Online. This publication does not purport to include all t
8、he 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 responsible international/European committee any enquiries on t
9、he 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, the EN ISO title page, the EN ISO foreword page, the I
10、SO title page, pages ii to v, a blank page, pages 1 to 11, the Annex ZA page, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 15052 24 March 2004 Implement
11、ation of the European StandardEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO16264 February2004 ICS13.060.50 Englishversion WaterqualityDeterminationofsolublesilicatesbyflowanalysis (FIAandCFA)andphotometricdetection(ISO16264:2002) QualitdeleauDosagedessilicatessolublesparanalyse enflux(FIAetCF
12、A)etdtectionphotomtrique(ISO 16264:2002) WasserbeschaffenheitBestimmunglslicherSilicate mittelsFlieanalytik(FIAundCFA)undphotometrischer Detektion(ISO16264:2002) ThisEuropeanStandardwasapprovedbyCENon2January2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatethecondit
13、ionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Av
14、ersioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hunga
15、ry,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004C
16、EN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO16264:2004:EINESO61:4622004(E) 2 Foreword ThetextofISO16264:2002hasbeenpreparedbyTechnicalCommitteeISO/TC147“Water quality“oftheInternationalOrganizationforStandardization(ISO)andhasbeentakenoveras E
17、NISO16264:2004byTechnicalCommitteeCEN/TC230“Wateranalysis“,thesecretariatof whichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationof anidenticaltextorbyendorsement,atthelatestbyAugust2004,andconflictingnational standardsshallbewithdrawnatthelatestbyAugust2
18、004. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium, Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary, Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Neth
19、erlands,Norway,Poland, Portugal,Slovakia,Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. Endorsementnotice ThetextofISO16264:2002hasbeenapprovedbyCENasENISO16264:2004withoutany modifications. NOTENormativereferencestoInternationalStandardsarelistedinannexZA(normative). ENISO16264:2004 Reference n
20、umber ISO 16264:2002(E) OSI 2002INTERNATIONAL STANDARD ISO 16264 First edition 2002-05-15 Water quality Determination of soluble silicates by flow analysis (FIA and CFA) and photometric detection Qualit de leau Dosage des silicates solubles par analyse en flux (FIA et CFA) et dtection photomtrique E
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25、o I roSOs membre ydob it neh ctnuoo yrf ttseuqer eh.re ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.oc h Web ww.wiso.ch ii ISO 2002 Allr ithgsr ese devrENISO16264:2004IS:46261 O2002(E) I SO 2002 All irthgs ersedevr iiiConten
26、ts Page Foreword.iv Introduction.v 1 Scope 1 2 Normative references1 3 General interferences1 4 Principle2 5 Reagents.2 6 Apparatus .4 7 Sampling and sample preparation.7 8 Procedure .7 9 Calculation .9 10 Precision.9 11 Test report 10 Bibliography11 ENISO16264:2004IS:46261 O2002(E) iv I SO 2002 All
27、 irthgs ersedevr Foreword ISO (the International 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 subj
28、ect for which a technical committee 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 (IE
29、C) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committ
30、ees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO
31、 shall not be held responsible for identifying any or all such patent rights. ISO 16264 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 2, Physical, chemical, biochemical methods. ENISO16264:2004IS:46261 O2002(E) I SO 2002 All irthgs ersedevr vIntroduction Further inve
32、stigation will be necessary to determine whether and to what extent particular problems will require the specification of additional minor conditions. It is absolutely essential that tests conducted according to this International Standard be carried out by suitably qualified staff. Differentiation
33、is required between flow injection analysis (FIA) 1,2 , and continuous flow analysis (CFA) 3 . Both methods share the feature of an automatic dosage of the sample into a flow system (manifold) where the analytes in the sample react with the reagent solutions on their way through the manifold. The sa
34、mple preparation may be integrated into the manifold. The reaction product is determined in a flow detector (e.g. photometer). This detector produces a signal from which the concentration of the parameter can be calculated. Methods using flow analysis automate wet chemical procedures and are particu
35、larly suitable for processing many analytes in water in large sample series at a high analysis frequency. ENISO16264:2004blank ENISO16264:2004INTENRATIONAL TSANDADR IS:46261 O2002(E)I SO 2002 All irthgs ersedevr 1Water quality Determination of soluble silicates by flow analysis (FIA and CFA) and pho
36、tometric detection 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 appropriate
37、safety and health practices and to ensure compliance with any national regulatory conditions. 1 Scope This International Standard specifies two methods, i.e. flow injection analysis (FIA) and continuous flow analysis (CFA), for the determination of soluble silicate ions in various types of water (su
38、ch as ground, drinking, surface, leachate and waste water). Both methods are applicable to the determination of a mass concentration of silicate (SiO 2 ) ranging from 0,2 mg/l to 20 mg/l (with working ranges 0,2 mg/l to 2,0 mg/l and 2 mg/l to 20 mg/l). Other mass concentration ranges are applicable,
39、 provided they cover exactly one decade of concentration units (e.g. 0,02 mg/l to 0,2 mg/l in SiO 2 ). These methods can be made applicable to seawater by changing the sensitivity and by adapting the reagent and calibration solutions to the salinity of the samples. 2 Normative references The followi
40、ng normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International S
41、tandard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International
42、Standards. ISO 3696:1987, Water for analytical laboratory use Specification and test methods ISO 5725-2:1994, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method ISO 8466
43、-1:1990, Water quality Calibration and evaluation of analytical methods and estimation of performance characteristics Part 1: Statistical evaluation of the linear calibration function 3 General interferences Tannin, large amounts of iron, sulfide and phosphate interfere. The treatment with oxalic ac
44、id reduces the interference from tannin and eliminates interference from phosphate provided the mass concentrations are 150 mg/l, treat the samples with boric acid. High concentrations of oxidizing agents are destroyed by adding 1 mol/l of sodium sulfite solution prior to analysis. If the sample con
45、tains large concentrations of sulfide, e.g. 5 mg/l, special provisions are necessary. ENISO16264:2004IS:46261 O2002(E) 2 I SO 2002 All irthgs ersedevr 4 Principle 4.1 FIA method The sample is injected into a carrier stream of water by means of a valve. An acidic solution of heptamolybdate is added t
46、o the sample and reacts with silicates and phosphates to form molybdosilicate and molybdophosphoric acid. The latter is destroyed by oxalic acid. The molybdosilicate is then reduced to molybdenum blue using a tin(II) chloride solution. The result is expressed in milligrams of SiO 2per litre of water
47、. 4.2 CFA method An acidic solution of heptamolybdate is added to the sample and reacts with silicates and phosphates to form molybdosilicate and molybdophosphoric acid. The latter is destroyed by oxalic acid. The molybdosilicate is then reduced to molybdenum blue using ascorbic acid. The result is
48、expressed in milligrams of SiO 2per litre of water. 5 Reagents Use analytical grade chemicals unless otherwise specified. Check the silicate blank value of the water and of the reagents (8.2.1). Carefully degas all reagent solutions, e.g. by vacuum filtration or by purging with helium (about 1 min). Use only polyethene or polypr
