1、STDmBSI BS EN 3322-ENGL 2003 m 1624667 0708633 554 BRITISH STANDARD Plastics - Determination of cadmium - Wet decomposition method The European Standard EN 1122:2001 has the status of a British Standard ICs 83.080.01 BS EN L122:2001 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT
2、LAW STDmBSI BS EN 1122-ENGL 2001 M 1624669 0908634 490 W BS EN 1122:2001 National foreword This British Standard is the official English language version of EN 1122:2001. It supersedes DD ENV 1122:1995 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee P
3、RI21, Plastics test methods, which has the responsibility to: - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developme
4、nts and promulgate them in the UK. - A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalog
5、ue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their cor
6、rect application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes
7、into effect on 15 May 2001 Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd.No7 TGte
8、1 Comments O BSI 05-2001 ISBN O 580 37236 7 - STD.BSI BS EN 1122-ENGL 2001 Lb24bb9 0906615 327 EUROPEAN STANDARD EN 1122 NORME EUROPENNE EUROPISCHE NORM March 2001 ICs 83.080.01 Supersedes ENV 1122:1995 English version Plastics - Determination of cadmium - Wet decomposition method Plastiques - DBter
9、mination du cadmium - Mthode par dcomposition par voie humide Kunststoffe - Bestimmung von Cadmium - Nassaufschlussverfahren This European Standard was approved by CEN on 18 January 2001. CEN members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giv
10、ing this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versio
11、ns (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austna, Belgium, Czech
12、 Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMiTF,E FOR STANDARDIZATION COMITI? EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FOR NORMUNG Management Centre: rue de
13、 Stassart, 36 B-1050 Brussels Q 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 11222001 E STD.BSI ES EN lL22-ENGL 2001 m 1b24bb9 D908blb 263 m Page 2 EN 1122:2001 Foreword This European Standard has been prepared by Technical
14、 Committee CENTTC 249, Plastics, the Secretariat of which is held by IBN. 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 September 2001, and conflicting national standards shall be withdrawn at t
15、he latest by September 2001. This European Standard replaces ENV 1122:1995. According to the CENEENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Ger
16、many, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. O BSI 05-2001 STD-BSI BS EN 3122-ENGL 2001 3624667 0708637 LTT Page 3 EN 1122:2001 1 Scope This European Standard describes a method for the determination of the total
17、 Cadmium (Cd) content in plastics in the range of 10 mg Cd/kg to 3 O00 mg Cdlkg. It is not suitable for polyfluorinated plastic materials. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cite
18、d 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 amendment or revision. For undated references the latest edition
19、 of the publication referred to applies (including amendments). IS0 3696: 1987 Water for analytical laboratory use - Specification and test methods. IS0 38564: 1984 Paints and varnishes - Determination of “soluble“ metal content - Pari 4: Determination of cadmium content - Flame atomic absorption sp
20、ectromeffic method and polarographic method. 3 Principle Wet decomposition of organic compounds and dissolution of cadmium compounds in a sample. Atomization of a solution in the flame of an atomic absorption spectrophotometer and the measurement of the absorbance at a wavelength of 228,8 nm. 4 Reag
21、ents During the analysis, use only reagents of recognized analytical grade and only distilled water or water of equivalent purity (IS0 3696:1987). 4.1 Sulfuric acid d = 1,83 g/l 95 % (m/m). 4.2 Nitric acid d = 1,40 g/l 65 YO (mlm). 4.3 Hydrogen peroxide d = 1,lO g/l 30 % (m/m). 4.4 Cadmium metal wit
22、h a purity of 99,9 % or a commercial cadmium standard stock solution (1 g Cdll) (IS0 385641984). Cadmium standard solutions (0,5 mg Cd/l and I ,O mg Cd/l) (IS0 3856-4:1984). 4.5 5 Apparatus 5.1 Apparatus for wet decomposition (e.g. Figure I), Kjeldahl flask or any other suitable apparatus for wet de
23、composition. 5.2 Hot plate 5.3 Fume cupboard, preferably with air washing. 5.4 Flame atomic absorption spectrophotometer with background correction, e.g. D2 or Zeemann (IS0 385641984). 5.5 Hollow cathode lamp or EDL for cadmium (IS0 3856-4:19 therefore use a background correction (5.4). For the dete
24、rmination of the cadmium concentration of the test solutions and the blank solutions other suitable techniques can be used, e.g. inductively-coupled plasma (ICP) or an isotope specific method. The used technique shall be noted in the test report. 7 Expression of results The total cadmium content of
25、the sample is given by the following formula in mgikg: where: C is the cadmium concentration in milligrams per litre of the test solution obtained by 6.4; B is the cadmium concentration in milligrams per litre of the reagent blank solution obtained by 6.4; A4 is the mass, in grams of the test portio
26、n; f is the dilution factor of the test solution and the reagent blank solution used by clause 4. If the two results dont differ more than 20 % based on the average (results between 10 mg Cd/kg and 50 mg Cd/kg) or 10 % (results between 50 mg Cd/kg and 3 O00 mg Cdlkg), then take the mean. Otherwise r
27、epeat the analysis. O BSI 05-2001 STD-BSI BS EN 1122-ENGL 2001 1624669 0908621 b20 Page 7 EN 1122:2001 8 Repeatability, r: Precision Data of the Test Method The relative standard deviation between results, found on identical test material, by one operator, using the same apparatus, using the method
28、specified in this standard. Reproducibility, R: The relative standard deviation between independent results, found by two operators working in different laboratories, on identical test material, using the method specified in this standard. Range of level r* 10 mg Cd/kg to 50 mg Cdlkg 50 mg Cdlkg to
29、3 O00 mg Cd/kg 20% 10% R* 25% 25% R R* = - 100% m where: m is the average of all values for each level. The precision data were determined from an experiment conducted in 1992 involving 7 laboratories, 6 samples and 5 different plastics (PE, PP, PS, PVC and PET). The precision data only refer to the
30、 5 tested plastics. There exists a lot of experience that these data also can be used for the determination of the cadmium content of other sorts of plastics materials with the exemption of the polyfiuorated plastics. 9 TestReport The test reports shall contain at least the following information: a)
31、 type and identification of the products tested; b) a reference to this European Standard and a reference to the used method (A or B); c) the results of the test expressed as mg Cadmium/kg plastic material (mean values and single measurement results); any deviation, by agreement or otherwise, from t
32、he test procedure specified here; date of the test and name of the operator. d) e) O BSI 05-2001 STD*BSI BS EN LL22-ENGL 2001 D Lb24bb9 0908b22 567 BS EN 1122:2001 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for prepar
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