1、BS EN ISO2871-1:2010ICS 71.100.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDSurface active agents Detergents Determination ofcationic-active mattercontentPart 1: High-molecular-mass cationic-active matter (ISO 2871-1:2010)This British Standard was published
2、 under the authority of the Standards Policy and Strategy Committee on 30 April 2010. BSI 2010ISBN 978 0 580 68044 1Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 2871-1:2010National forewordThis British Standard is the UK implementation of EN ISO 2871-1:2010.It supersedes BS E
3、N ISO 2871-1:1994 which is withdrawn. The UK participation in its preparation was entrusted to TechnicalCommittee CII/34, Methods of test for surface active agents.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to in
4、clude all the necessary provisionsof a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2871-1 February 2010 ICS 71.100.40 Supersedes EN ISO 2871-1:199
5、4English Version Surface active agents - Detergents - Determination of cationic-active matter content - Part 1: High-molecular-mass cationic-active matter (ISO 2871-1:2010) Agents de surface - Dtergents - Dtermination de la teneur en matire active cationique - Partie 1: Matire active cationique haut
6、e masse molculaire (ISO 2871-1:2010) Tenside - Waschmittel - Bestimmung des Gehaltes der kationaktiven Substanz - Teil 1: Hochmolekulare kationaktive Substanz (ISO 2871-1:2010) This European Standard was approved by CEN on 11 February 2010. CEN members are bound to comply with the CEN/CENELEC Intern
7、al 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 references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN membe
8、r. 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 member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN member
9、s are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, S
10、weden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Member
11、s. Ref. No. EN ISO 2871-1:2010: EBS EN ISO 2871-1:2010EN ISO 2871-1:2010 (E) 3 Foreword This document (EN ISO 2871-1:2010) has been prepared by Technical Committee ISO/TC 91 “Surface active agents“ in collaboration with Technical Committee CEN/TC 276 “Surface active agents” the secretariat of which
12、is held by AFNOR. 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 August 2010, and conflicting national standards shall be withdrawn at the latest by August 2010. Attention is drawn to the possibi
13、lity that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 2871-1:1994. According to the CEN/CENELEC Internal Regulations, the national standards
14、organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland
15、, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 2871-1:2010 has been approved by CEN as a EN ISO 2871-1:2010 without any modification. BS EN ISO 2871-1:2010ISO 2871-1:2010(E) ISO 2010 All rights reserved iiiForeword ISO (
16、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 subject for which a technical commi
17、ttee 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 (IEC) on all matters of electrotec
18、hnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the membe
19、r 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 document may be the subject of patent rights. ISO shall not be held responsible for identifyin
20、g any or all such patent rights. ISO 2871-1 was prepared by Technical Committee ISO/TC 91, Surface active agents. This second edition cancels and replaces the first edition (ISO 2871-1:1988), of which it constitutes a minor revision. ISO 2871 consists of the following parts, under the general title
21、Surface active agents Detergents Determination of cationic-active matter content: Part 1: High-molecular-mass cationic-active matter Part 2: Cationic-active matter of low molecular mass (between 200 and 500) BS EN ISO 2871-1:2010BS EN ISO 2871-1:2010INTERNATIONAL STANDARD ISO 2871-1:2010(E) ISO 2010
22、 All rights reserved 1Surface active agents Detergents Determination of cationic-active matter content Part 1: High-molecular-mass cationic-active matter 1 Scope This part of ISO 2871 specifies a method for the determination of high-molecular-mass cationic-active materials such as a) quaternary ammo
23、nium compounds in which two of the alkyl groups each contain 10 or more carbon atoms, e.g. distearyl-dimethyl-ammonium chlorides, or b) salts of imidazoline or 3-methylimidazoline in which long-chain acylaminoethyl and alkyl groups are substituted in the 1- and 2-positions, respectively. The method
24、is applicable to solids or to aqueous solutions of the active material when the relative molecular mass of the cationic-active matter is known or when it has been previously determined if its content is expressed as a percentage by mass. The method is not applicable if anionic surface active agents
25、are present. 2 Normative references The following referenced documents are indispensable for the application 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 385, Labo
26、ratory glassware Burettes ISO 607, Surface active agents and detergents Methods of sample division ISO 1042, Laboratory glassware One-mark volumetric flasks ISO 2271:1989, Surface active agents Detergents Determination of anionic-active matter by manual or mechanical direct two-phase titration proce
27、dure 3 Principle Titration of an aliquot portion of a standard solution of sodium lauryl sulfate with a solution of the test sample, according to the direct two-phase titration procedure described in ISO 2271. BS EN ISO 2871-1:2010ISO 2871-1:2010(E) 2 ISO 2010 All rights reserved4 Reagents During th
28、e analysis, use only reagents of recognized analytical grade and only distilled water or water of at least equivalent purity. 4.1 Chloroform, 20= 1,48 g/ml, distilling between 59,5 C and 61,5 C. 4.2 Propan-2-ol. 4.3 Sodium lauryl sulfate, standard volumetric solution, c(C12H25NaO4S) = 0,004 mol/l. S
29、ee 4.5 of ISO 2271:1989. 4.4 Mixed indicator solution. See 4.8 of ISO 2271:1989. 5 Apparatus Ordinary laboratory apparatus and the following: 5.1 Flask or measuring cylinder, 100 ml capacity, with ground-glass stopper. 5.2 Burette, 25 ml capacity, complying with the specifications for class A of ISO
30、 385. 5.3 One-mark volumetric flask, 1 000 ml capacity, with ground-glass stopper, complying with class A of ISO 1042. 6 Sampling The laboratory sample of the detergent shall be prepared and stored in accordance with the instructions given in ISO 607. 7 Procedure 7.1 Test portion Weigh, to the neare
31、st 1 mg, a sufficient amount of the laboratory sample to contain between 0,002 mol and 0,004 mol of cationic-active matter. NOTE This will give a titration volume of between 10 ml and 20 ml. Possible interferences: Low relative molecular mass sulfonates of toluene and xylene present as hydrotropes d
32、o not interfere when present in concentrations up to and including 15 % (mass fraction) with respect to the active material. At higher levels, their influence should be evaluated in each particular case. Non-ionic surface active agents, soap, urea and the salts of (ethylenedinitrilo)tetraacetic acid
33、 do not interfere. Typical inorganic components of detergent formulations, such as sodium chloride, sulfate, borate, tripolyphosphate, perborate, silicate, etc., do not interfere, but bleaching agents other than perborate shall be destroyed before the analysis, and the sample shall be completely sol
34、uble in water. BS EN ISO 2871-1:2010ISO 2871-1:2010(E) ISO 2010 All rights reserved 37.2 Determination Dissolve the test portion (7.1) in 20 ml of the propan-2-ol (4.2), warming if necessary. Add approximately 50 ml of water and stir. Transfer to the 1 000 ml one-mark volumetric flask (5.3) and dilu
35、te to the mark with water. This is test solution A. By means of a pipette, transfer 10 ml of the standard volumetric sodium lauryl sulfate solution (4.3) into the flask or measuring cylinder (5.1). Add 10 ml of water, 15 ml of the chloroform (4.1) and 10 ml of the mixed indicator solution (4.4). Fil
36、l the burette (5.2) with test solution A. Titrate the sodium lauryl sulfate solution with test solution A; stopper the flask or measuring cylinder and shake well after each addition. The lower layer of chloroform will be coloured pink. As the end point approaches, the emulsions formed during shaking
37、 tend to break easily and the coloration of the chloroform layer becomes fainter. From this point, continue the titration drop by drop, shaking after each addition of titrant, until the end point is reached. This is at the moment when the pink colour is completely discharged from the chloroform laye
38、r, which turns a faint greyish blue. With excess of test solution A, the chloroform layer turns blue. Note the volume of test solution A required for the titration. 8 Expression of results 8.1 Calculation The content, expressed as a percentage by mass, of cationic-active matter is given by the formu
39、la rr0010 1000 100 10001000 cM cMVm Vm = where c is the actual concentration, expressed in moles of C12H25NaO4S per litre, of the sodium lauryl sulfate solution (4.3); Mris the relative molecular mass of the cationic-active matter; V is the volume, in millilitres, of test solution A used for the tit
40、ration; m0 is the mass, in grams, of the test portion (7.1). 8.2 Precision 8.2.1 Repeatability The difference between the results of two determinations carried out on the same sample simultaneously or in rapid succession by the same analyst using the same apparatus should not exceed 1,5 % of the mea
41、n value. 8.2.2 Reproducibility The difference between the results obtained on the same sample in two different laboratories should not exceed 3 % of the mean value. BS EN ISO 2871-1:2010ISO 2871-1:2010(E) 4 ISO 2010 All rights reserved9 Test report The test report shall include the following informa
42、tion: a) all the indications necessary for the complete identification of the sample; b) the method used (reference to this part of ISO 2871); c) the results obtained and the way in which they have been expressed; d) any unusual features noted during the determination; e) any operation not specified
43、 in this part of ISO 2871 or in the International Standards to which reference is made, as well as any operation regarded as optional. BS EN ISO 2871-1:2010BS EN ISO2871-1:2010BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 - British Standards
44、 InstitutionBSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at theinternational level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of BritishStandards sh
45、ould make sure that they possess the latest amendments oreditions.It is the constant aim of BSI to improve the quality of our products and services.We would be grateful if anyone finding an inaccuracy or ambiguity while usingthis British Standard would inform the Secretary of the technical committee
46、responsible, the identity of which can be found on the inside front cover. Tel:+44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.BSI offers members an individual updating service called PLUS which ensuresthat subscribers automatically receive the latest editions of standards.Buying standardsOrders for a
47、ll BSI, international and foreign standards publications should beaddressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 89967001 Email: You may also buy directly using a debit/creditcard from the BSI Shop on the Website http:/ response to orders for international standards, it is
48、 BSI policy to supply theBSI implementation of those that have been published as British Standards,unless otherwise requested.Information on standardsBSI provides a wide range of information on national, European andinternational standards through its Library and its Technical Help to ExportersServi
49、ce. Various BSI electronic information services are also available whichgive details on all its products and services. Contact Information Centre. Tel:+44 (0)20 8996 7111 Fax: +44 (0)20 8996 7048 Email: Subscribing members of BSI are kept up to date with standards developmentsand receive substantial discounts on the purchase price of standards. For detailsof these and other benefits contact Membership Administration. Tel: +
