1、May 2017 English price group 11No 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 59.140.30!%eBq“2663178www.din.deDIN
2、EN ISO 17075-1Leather Chemical determination of chromium(VI) content in leather Part 1: Colorimetric method (ISO 170751:2017);English version EN ISO 170751:2017,English translation of DIN EN ISO 17075-1:2017-05Leder Bestimmung des Chrom(VI)Gehalts in Leder Teil 1: Kolorimetrisches Verfahren (ISO 170
3、751:2017);Englische Fassung EN ISO 170751:2017,Englische bersetzung von DIN EN ISO 17075-1:2017-05Cuir Dtermination chimique de la teneur en chrome(VI) du cuir Partie 1: Mthode colorimtrique (ISO 170751:2017);Version anglaise EN ISO 170751:2017,Traduction anglaise de DIN EN ISO 17075-1:2017-05Togeth
4、er with DIN EN ISO 170752:201705,supersedesDIN EN ISO 17075:200802www.beuth.deDocument comprises 17 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.05.17 DIN EN ISO 17075-1:2017-05 2 A comma is used as the decimal marker. Natio
5、nal foreword This document (EN ISO 17075-1:2017) has been prepared by Technical Committee CEN/TC 289 “Leather” (Secretariat: UNI, Italy) in collaboration with the “International Union of Leather Technologists and Chemists Societies” (IULTCS). The responsible German body involved in its preparation w
6、as DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-05-52 AA “Chemical test methods of leather”. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 2418 DIN EN ISO 2418 ISO 3696 DIN I
7、SO 3696 ISO 4684 DIN EN ISO 4684 Amendments This standard differs from DIN EN ISO 17075:2008-02 as follows: a) the standard has been divided into two parts: Part 1, the colorimetric method and Part 2, chromatography; b) in 7.1, the sample preparation has been revised; c) 7.1, 7.2 and 7.3 have been t
8、echnically revised; d) the standard has been editorially revised. Previous editions DIN 53314: 1996-04 DIN CEN/TS 14495: 2003-08 DIN EN ISO 17075: 2008-02 National Annex NA (informative) Bibliography DIN EN ISO 2418, Leather Chemical, physical and mechanical and fastness tests Sampling location DIN
9、EN ISO 4684, Leather Chemical tests Determination of volatile matter DIN ISO 3696, Water for analytical laboratory use Specification and test methods EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17075-1 February 2017 ICS 59.140.30 English Version Leather - Chemical determination of chrom
10、ium(VI) content in leather - Part 1: Colorimetric method(ISO 17075-1:2017) Cuir - Dtermination chimique de la teneur en chrome(VI) du cuir - Partie 1: Mthode colorimtrique (ISO 17075-1:2017) Leder - Bestimmung des Chrom(VI)-Gehalts in Leder - Teil 1: Kolorimetrisches Verfahren (ISO 17075-1:2017)This
11、 European Standard was approved by CEN on 30 December 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical refere
12、nces 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). A version in any other language made by translation under the responsibility of a CEN
13、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, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
14、 France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION E
15、UROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17075-1:2017 EEuropean foreword .31 Scope . 52 Normative references 53 Terms an
16、d definitions . 54 Principle 65 Chemicals . 66 Apparatus and materials 77 Procedure. 77.1 Sampling and preparation of samples 77.2 Preparation of analytical solution 77.3 Determination of chromium(VI) in the solution obtained from the extraction procedure 87.4 Blank solution 87.5 Calibration 97.6 De
17、termination of the recovery rate . 97.6.1 Influence of the matrix . 97.6.2 Influence of the SPE material (6.9) 98 Calculation and expression of results 108.1 Calculation of chromium(VI) content . 108.2 Recovery rate (according to 7.6.1) 108.3 Expression of results . 119 Test report 11Annex A (inform
18、ative) Solid phase extraction (SPE) material 12Annex B (informative) Accuracy . 13Annex C (informative) Comparison between the colorimetric method (ISO 17075-1) and the ionic chromatography method (ISO 17075-2) .15Contents PageDIN EN ISO 17075-1:2017-05 EN ISO 17075-1:2017 (E) 2Foreword 4European fo
19、reword This document (EN ISO 17075-1:2017) has been prepared by Technical Committee CEN/TC 289 “Leather” the secretariat of which is held by UNI, in collaboration with Technical Committee IULTCS “International Union of Leather Technologists and Chemists Societies”. This European Standard shall be gi
20、ven the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2017, and conflicting national standards shall be withdrawn at the latest by August 2017. Attention is drawn to the possibility that some of the elements of this document may
21、be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria,
22、Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sw
23、eden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 17075-1:2017 has been approved by CEN as EN ISO 17075-1:2017 without any modification. N1)National footnote: This document supersedes EN ISO 17075:2007. This document supersedes EN 17075:2007 . N1)DIN EN ISO 17075-1
24、:2017-05 EN ISO 17075-1:2017 (E)3 ForewordISO (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 inte
25、rested in a subject 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 Electrotechnica
26、l Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO docum
27、ents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).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 respons
28、ible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents).Any trade name used in this document is information given
29、 for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Tra
30、de (TBT) see the following URL: www .iso .org/ iso/ foreword .htmlISO 17075-1 was prepared by the Chemical Test Commission of the International Union of Leather Technologists and Chemists Societies (IUC Commission, IULTCS) in collaboration with the European Committee for Standardization (CEN) Techni
31、cal Committee CEN/TC 289, Leather, the secretariat of which is held by UNI, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).IULTCS, originally formed in 1897, is a world-wide organization of professional leather societies to further the advancement of
32、 leather science and technology. IULTCS has three Commissions, which are responsible for establishing international methods for the sampling and testing of leather. ISO recognizes IULTCS as an international standardizing body for the preparation of test methods for leather.This first edition of ISO
33、17075-1, together with ISO 17075-2, cancels and replaces ISO 17075:2007, which has been technically revised.The main changes compared to ISO 17075:2007 are as follows: the sample preparation has been revised; mechanical shaking in 7.1, 7.2 and 7.3 has been revised.A list of all parts in the ISO 1707
34、5 series can be found on the ISO website.DIN EN ISO 17075-1:2017-05 EN ISO 17075-1:2017 (E) 4 1 ScopeThis document specifies a method for determining chromium(VI) in solutions leached from leather under defined conditions. The method described is suitable to quantify the chromium(VI) content in leat
35、hers down to 3 mg/kg.This document is applicable to all leather types.The results obtained from this method are strictly dependent on the extraction conditions. Results obtained by using other extraction procedures (extraction solution, pH, extraction time, etc.) are not comparable with the results
36、produced by the procedure described in this document.If a leather sample is tested with both this document and ISO 17075-2, the results obtained with ISO 17075-2 are considered as the reference. The advantage of the method described in ISO 17075-2 is that there are no interferences from the colour o
37、f the extract. Nevertheless, interlaboratory trials do not show significant differences (see Annex C) and the results are comparable between both methods.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements
38、 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 2418, Leather Chemical, physical and mechanical and fastness tests Sampling locationISO 3696, Water for analytical lab
39、oratory use Specification and test methodsISO 4044:2017, Leather Chemical tests Preparation of chemical test samplesISO 4684, Leather Chemical tests Determination of volatile matter3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintai
40、n terminological databases for use in standardization at the following addresses: ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp IEC Electropedia: available at h t t p :/ www .electropedia .org/ 3.1chromium(VI) contentamount of chromium(VI) in leather determined after extra
41、ction with an aqueous salt solution at pH 7,0 to 8,0Note 1 to entry: The chromium(VI) content is reported as chromium(VI) in milligrams per kilogram (mg/kg), expressed as the dry mass of the sample.DIN EN ISO 17075-1:2017-05 EN ISO 17075-1:2017 (E)5 4 PrincipleExtractable chromium(VI) is leached fro
42、m the sample in phosphate buffer at pH 7,0 to 8,0 and co-extracted coloured substances which influence the detection are removed by solid phase extraction if necessary. The chromium(VI) in solution oxidizes 1,5-diphenylcarbazide to 1,5-diphenylcarbazone to give a red/violet complex with chromium whi
43、ch can be quantified photometrically at 540 nm.5 ChemicalsAll reagents used shall have at least analytical grade purity.5.1 Extraction solutionDissolve 22,8 g dipotassium hydrogenphosphate, K2HPO43H2O, in 1 000 ml water, adjusted to pH 8,0 0,1 with phosphoric acid (5.3). Degas this solution with eit
44、her argon or nitrogen (5.6) or ultrasonic bath.Standard practice is to make up a fresh solution each day. However, the solution can be kept for up to one week in a refrigerator at (4 3) C but shall be warmed to room temperature and degassed prior to use.5.2 Diphenylcarbazide (DPC) solutionDissolve 1
45、,0 g 1,5-diphenylcarbazide, CO(NHNHC6H5)2, in 100 ml acetone, (CH3)2CO, and acidified with one drop of glacial acetic acid, CH3COOH.The solution should be kept in a brown glass bottle. The shelf life is up to 14 days at 4 C.5.3 Phosphoric acid solution700 ml o-phosphoric acid, = 1,71 g/ml, made up t
46、o 1 000 ml with deionised water (5.7).First add approximately 200 ml of deionised water (5.7) to a 1 000 ml volumetric flask, then add the 700 ml of o-phosphoric acid and dilute to the mark with deionised water.5.4 Chromium(VI) stock solutionDissolve 2,829 g potassium dichromate (K2Cr2O7) (5.8) in w
47、ater in a volumetric flask and make up to 1 000 ml with water. One millilitre of this solution contains 1 mg of chromium.A stock solution at this concentration level of hexavalent chromium is an alternative available commercially.5.5 Chromium(VI) standard solutionPipette 1 ml of solution (5.4) into
48、a 1 000 ml volumetric flask and make up to the mark with extraction solution (5.1). One millilitre of this solution contains 1 g of chromium.The solution can be kept for up to one week in a refrigerator at (4 3) C but shall be warmed to room temperature prior to use.A stock solution at this concentration level of hexavalent chromium is an alternative available commercially.5.6 Argon or nitrogen, oxygen-freePreference should be given to argon as an inert gas instead of nitrogen because argon has a h
