1、BSI Standards PublicationBS ISO 1125:2015Rubber compoundingingredients Carbon black Determination of ashBS ISO 1125:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 1125:2015. Itsupersedes BS ISO 1125:1999+A1:2011 which is withdrawn.The UK participation in
2、its preparation was entrusted to TechnicalCommittee PRI/50, Rubber - Raw, natural and synthetic, includinglatex and carbon black.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions o
3、f a contract. Users are responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 89095 6ICS 83.040.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under t
4、he authority of theStandards Policy and Strategy Committee on 31 July 2015.Amendments issued since publicationDate Text affectedBS ISO 1125:2015 ISO 2015Rubber compounding ingredients Carbon black Determination of ashIngrdients de mlange du caoutchouc Noir de carbone Dtermination du taux de cendresI
5、NTERNATIONAL STANDARDISO1125Fourth edition 2015-08-15Reference numberISO 1125:2015(E)BS ISO 1125:2015ISO 1125:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be repro
6、duced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester
7、.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 1125:2015ISO 1125:2015(E)Foreword iv1 Scope . 12 Normative references 13 Principle 14 Apparatus . 15 Sampling 16 Procedure. 27 Expression of r
8、esults 28 Precision . 29 Test report . 3Annex A (informative) Precision data . 4Bibliography 6 ISO 2015 All rights reserved iiiContents PageBS ISO 1125:2015ISO 1125:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO mem
9、ber 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. International organizations, governmen
10、tal 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.The procedures used to develop this document and those intended for its further maintenance
11、are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents 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
12、 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or
13、 on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given 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 asses
14、sment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 45, Rubber and rubber products, Subcommittee SC 3, Raw materials (includi
15、ng latex) for use in the rubber industry.This fourth edition cancels and replaces the third edition (ISO 1125:1999), of which it constitutes a minor revision. It also incorporates ISO 1125:1999/Amd.1:2011.The modifications include updating the normative references (in Clause 2 and throughout the tex
16、t), moving precision data in an informative annex and adding a Bibliography.iv ISO 2015 All rights reservedBS ISO 1125:2015INTERNATIONAL STANDARD ISO 1125:2015(E)Rubber compounding ingredients Carbon black Determination of ashWARNING Persons using this International Standard should be familiar with
17、normal laboratory practice. This 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 safety and health practices and to ensure compliance with any national regulatory conditions.1 ScopeThis In
18、ternational Standard specifies a method for determining the ash of all types of carbon black for use in the rubber industry.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references,
19、 only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1124, Rubber compounding ingredients Carbon black shipment sampling procedures3 PrincipleAn accurately weighed portion of dried sample is ignited in a crucibl
20、e until all the carbonaceous material is oxidized. The crucible is cooled in a desiccator, weighed, and the percentage of ash calculated.4 Apparatus4.1 Muffle furnace, capable of maintaining a temperature of 550 C 25 C (or other required temperature).NOTE The use of a vented furnace would decrease t
21、he time of heating to constant mass (see 6.3).4.2 Porcelain crucible, tall form, diameter 35 mm, height 30 mm, with lid.The use of the lid on the crucible is optional. If it is not used, this shall be mentioned in the test report.4.3 Analytical balance, accurate to 0,1 mg.4.4 Desiccator.4.5 Oven, pr
22、eferably of the gravity-convection type, capable of temperature regulation to within 1 C at 125 C and temperature uniformity to within 5 C.5 SamplingCarry out sampling in accordance with ISO 1124. ISO 2015 All rights reserved 1BS ISO 1125:2015ISO 1125:2015(E)6 Procedure6.1 Heat the crucible (4.2), w
23、ith its lid (if used), in the muffle furnace (4.1) at a temperature of 550 C 25 C for 1 h. Place the crucible (and lid) in the desiccator (4.4). Cool to ambient temperature and reweigh to the nearest 0,1 mg.NOTE If, after cleaning, drying and reweighing at the end of the determination (see 6.4), the
24、 crucible is stored in a dessicator, step 6.1 is needed only for new crucibles.6.2 Dry a little more than 2 g of furnace carbon black or a little more than 5 g of thermal or channel carbon black in the oven (4.5) at a temperature of 125 C for 1 h. Allow to cool to room temperature.6.3 Weigh, to the
25、nearest 0,1 mg, about 2 g of dried furnace carbon black or 5 g of dried thermal or channel black into the crucible tared in 6.1, place in the furnace at a temperature of 550 C 25 C and heat uncovered until constant mass is obtained.Cover with the lid (if used), remove to the desiccator, and allow to
26、 cool to ambient temperature. Weigh to the nearest 0,1 mg. To avoid repeated handling of the crucible, an adequate ashing time shall be established at each test site.IMPORTANT Take the following precautions:a) keep the door of the furnace open about 0,5 cm to admit air to support the combustion of o
27、rganic material;b) after the test portion has cooled in the desiccator, admit air slowly to avoid loss of ash from the crucible due to air currents.By mutual agreement between the interested parties, it is permissible to use another ashing temperature such as 750 C 25 C or 825 C 25 C (4.1, 6.1 and 6
28、.3 would have to be adapted accordingly).However, this temperature leads to lower ash contents than the ones obtained at 550 C, and shall not be used for reference purposes.6.4 Clean the crucible (and lid), dry in the oven (4.5) at 125 C and reweigh to the nearest 0,1 mg.7 Expression of resultsThe a
29、sh A is given, as a percentage by mass, by the following equation.Ammmm=2310100wherem0is the mass, in grams, of the crucible (and lid) before the determination;m1is the mass, in grams, of the crucible (and lid) plus the test portion;m2is the mass, in grams, of the crucible (and lid) plus the ash;m3i
30、s the mass, in grams, of the crucible (and lid) after the determination (should be the same as m0).8 PrecisionSee Annex A.2 ISO 2015 All rights reservedBS ISO 1125:2015ISO 1125:2015(E)9 Test reportThe test report shall include the following particulars:a) a reference to this International Standard;b
31、) all details necessary for complete identification of the sample;c) the results and the units in which they have been expressed;d) any unusual features noted during the determination;e) any operation not included in this International Standard, or any operation regarded as optional such as the ashi
32、ng temperature if different from the specified one or the omission of the crucible lid;f) the date of the test. ISO 2015 All rights reserved 3BS ISO 1125:2015ISO 1125:2015(E)Annex A (informative) Precision dataA.1 The precision of the method was determined in accordance with ISO/TR 9272. Refer to th
33、is document for terminology and other statistical details.A.2 The precision data given below merely give an estimate of the precision. The precision parameters shall not therefore be used for acceptance/rejection testing of any group of materials without documentation that they are applicable to tho
34、se particular materials and the specific test protocols that include this method.A.3 A type 1 interlaboratory precision programme was conducted. Both repeatability and reproducibility were measured under short-term testing conditions. Ten laboratories tested five carbon black samples (A, B, C, D and
35、 E) twice on two different days.Difference values were not measured.A.4 The results of the precision calculations are given in Table A.1, with the materials arranged in ascending order of the mean ash value.Table A.1 Precision dataMaterial Mean ash %Within laboratory Between laboratoriessrr (r) sRR
36、(R)Black A 0,17 0,016 0,045 25,497 0,021 0,060 35,188Black E 0,35 0,020 0,057 16,121 0,037 0,014 29,663Black B 0,45 0,030 0,085 18,919 0,043 0,122 27,067Black C 0,61 0,027 0,076 12,483 0,037 0,106 17,445Black D 0,83 0,016 0,045 5,620 0,023 0,066 7,961Pooled or averaged values 0,48 0,02 0,06 13,25 0,
37、03 0,09 19,63p = 10, q = 5 and n = 4sris the within-laboratory standard deviationr is the repeatability (in measurement units)(r) is the repeatability (in percent)sRis the between-laboratory standard deviationR is the reproducibility (in measurement units)(R) is the reproducibility (in percent)A.5 T
38、he precision for the pooled values for the ash may be expressed as follows:a) Repeatability: The repeatability r of the result has been established as 0,06 % ash. Two individual test results (or determinations) that differ from each other by more than 0,06 % ash shall be considered suspect and dicta
39、te that some appropriate investigative action be taken.4 ISO 2015 All rights reservedBS ISO 1125:2015ISO 1125:2015(E)b) Reproducibility: The reproducibility R of the result has been established as 0,09 % ash. Two individual test results (or determinations) produced in separate laboratories that diff
40、er by more than 0,09 % ash shall be considered suspect and dictate that some appropriate investigative action be taken.A.6 Bias: In test method terminology, bias is the difference between an average test value and the reference (true) test property value. Reference values do not exist for this test
41、method since the value of the test property is exclusively defined by the test method. Bias, therefore, cannot be determined. ISO 2015 All rights reserved 5BS ISO 1125:2015ISO 1125:2015(E)Bibliography1 ISO/TR 9272:2005, Rubber and rubber products Determination of precision for test method standards6
42、 ISO 2015 All rights reservedBS ISO 1125:2015BS ISO 1125:2015ISO 1125:2015(E) ISO 2015 All rights reservedICS 83.040.20Price based on 6 pagesThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and
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