1、CEN EN%L02L2 75 3404587 0120673 342 BRITISH STANDARD Chemical analysis of ferrous materials - Determination of arsenic in steel and iron - Spectrophotometric method The European Standard EN 10212 : 1995 has the status of a British Standard ICs 71.040.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PE
2、RMITTED BY COPYRIGHT LAW BS EN 10212 :1996 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ISE/18, Sampling and analysis of iron and steel, upon which the following bodies were represented: BCIRA British Iron and Steel Pr
3、oducers Association Ministry of Defence Welding Institute This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1996 O BSI 1996 Amendments issued since publication
4、 Amd* No. I Date I Text affected I I The following BSI references relate to the work on this standard : Committee reference ISE/18 Draft for comment 91138468 DC ISBN O 580 25440 2 - CEN EN*10212 95 3404589 0120b75 115 BS EN 10212 : 1996 Contents Page Committees responsible Inside front cover Nationa
5、l foreword 11 Foreword 2 Ext of EN 10212 3 1 CEN EN*(L0232 95 3404589 OL20b7b 051 BS EN 10212 : 1996 National foreword This British Standard has been prepared by Technical Committee ISE/18 and is the English language version of EN 10212 : 1995, Chemical analysis of ferrous materials - Determination
6、of arsenic in steel and iron - Spectrophotometric method, published by the European Committee for Standardization (CEN). It was produced as a result of international discussions in which the United Kingdom took an active part. Compliance with a British Standard does not of itself confer immunity fro
7、m legal obligations. O BSI 1996 11 CEN EN*L02L2 95 3404589 O320677 T98 EUROPEAN STANDARD EN 10212 NORME EUROPENNE EUROPISCHE NORM March 1995 ICs 71.040.40 Descriptors: Iron and steel products, steels, cast iron, chemical analysis, determination of content, arsenic, spectrophotometric analysis Englis
8、h version Chemical analysis of ferrous materials - Determination of arsenic in steel and iron - Spectrophotometric method Analyse chimique des matriaux sidrurgiques - Dosage de larsenic dans les aciers et les fontes - Mthode spectropho tom trique Chemische Analyse von Eisenwerkstoffen - Bestimmung v
9、on Arsen in Stahl und Eisen mittels Spektralphotometrie This European Standard was approved by CEN on 1995-02-06. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any al
10、teration. 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 (Enghsh, French, German). A version in any other language made by tran
11、slation 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembou
12、rg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1995 All rights of reproduction and communication in a
13、ny form and by any means reserved in all countries to CEN and its members. Ref. No. EN 10212 : 1995 E CEN EN*l102L2 95 m 3404589 OL20678 924 m Page 2 EN 10212 : 1995 Foreword This European Standard was prepared by Technical Committee ECISSITC 20, Methods of chemical analysis, the secretariat of whic
14、h is held by SIS. The 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 September 1995, and conflicting national standards shall be withdrawn at the latest by September 1995. According with the CENXENELE
15、C Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. Contents Foreword 1 Scope 2 Norm
16、ative references 3 Principle 4 Reagents 5 Apparatus 6 Sampling 7 Procedure 8 Expression of results 9 Tst report Annex A (informative) Precision data Page 2 3 3 3 3 3 4 4 5 6 7 0 BSI 1996 - CEN EN*I,02L2 95 m 3404589 OL20b79 bO W Page 3 EN 10212 : 1995 1 Scope This European Standard specifies a spect
17、rophotometric method for the determination of arsenic in steel and iron. The method is 4.5 Hydrochloric - nitric acid mixture. Add 65 ml nitric acid, approximately p 1,40 g/ml, to 100 ml water; add the resulting diluted acid to 60 ml hydrochloric acid (4.3) and mix. applicable to all types of steel
18、and iron with arsenic contents from 0,001 5% to 0,08 % (mim). 4.6 Absorption solution. Dissolve 1,25 g of silver diethyldithiocarbamate (CsHloAgNS2) and O, 825 g of 1-ephedrin in approximately 400 ml of 2 Normative references This European Standard incorporates by dated or undated references, provis
19、ions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by
20、 amendment or revision. For undated references the latest edition of the publication referred to applies. EURONORM 18 : 1979 Selection und preparation of samples und test pieces for steel and iron and steel products 3 Principle Dissolution of a test portion in a mixture of nitric and hydrochloric ac
21、ids followed by evaporation to dryness and prolonged heating of the dried residue. Extraction of the residue with acid, reduction of the arsenic (As V to As III) by addition of potassium iodide, ascorbic acid and tin (II) chloride. Conversion of the arsenic to arsenic hydride (arsine) with zinc. Abs
22、orption of the evolved arsine in a solution of silver diethyldithiocarbamate and 1-ephedrin in trichloromethane. Spectrophotometric measurement of the reddish-violet coloured colloid at a wavelength between 500 nm and 520 nm. 4 Reagents During the analysis, use only reagents of recognized analytical
23、 quality and only distilled water or water of equivalent purity. 4.1 Iron, of high purity, free of arsenic or of known low arsenic content. 4.2 Zinc, of high purity, free of arsenic or of known low arsenic content. Zinc shot, 0,5 mm to 2 mm, and zinc pellets, approximately 5 mm in diameter. 4.3 Hydr
24、ochloric acid, approximately p 1,19 b) the results obtained; e) any particular details which may have been noted during the determination; d) any operations not specified in this European Standard or any optional operations which could have had an influence on the result; e) all indications necessar
25、y for the identification of the sample; f) the laboratory and the date of analysis. O BSI 1996 CEN EN*30232 95 = 3404589 0320683 291 Page 7 EN 10212 : 1995 Annex A (informative) Precision data The method has been tested by analysts of different laboratories on the certified reference materials shown
26、 in table A. 1. The available data do not permit statistical analysis according to IS0 5725 : 1986. The results obtained show a standard deviation of 0,002 % As at a concentration level of 0,050 !% As. hble A. 1 Certified reference materials tested Materials Certified As content % EURONORM CRM 077-2
27、 Unalloyed steel 0,007 NBS 55e Open hearth iron O, 007 EURONORM CRM 053-1 High purity iron 0,009 NBS 82 Ni-Cr cast iron 0,009 NBS 4g Cast iron 0,012 BCS 322 Unalloyed steel 0,012 EURONORM CRM 077-1 Unalloyed steel 0,014 EURONORM CRM 039-2 Unalloyed steel 0,018 BCS 260/3 High punty iron 0,026 EURONOR
28、M CRM 076-2 Unalloyed steel 0,022 EURONORM CRM 082-1 Unalloyed steel 0,029 BCS 239-3 Unalloyed steel 0,032 NBS 6f Cast iron 0,032 EURONORM CRM 079-1 Unalloyed steel 0,051 BCS 453 Unalloyed steel 0,052 O BSI 1996 CEN EN*30212 95 3404589 O320684 328 BS EN 10212 : 1996 List of references See national f
29、oreword. O BSI 1996 CEN EN*10212 95 = 3404587 0320685 Ob4 BS EN 10212 : 1996 BSI 389 Chiswick High Road London W4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the intern
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