1、June 2010 Translation by DIN-Sprachendienst.English price group 6No 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 71
2、.100.40!$i4“1700417www.din.deDDIN EN ISO 2871-1Surface active agents Detergents Determination of cationic-active matter content Part 1: High-molecular-mass cationic-active matter (ISO 2871-1:2010)English translation of DIN EN ISO 2871-1:2010-06Tenside Waschmittel Bestimmung des Gehaltes der kationak
3、tiven Substanz Teil 1: Hochmolekularekationaktive Substanz (ISO 2871-1:2010)Englische bersetzung von DIN EN ISO 2871-1:2010-06Agents de surface Dtergents Dtermination de la teneur en matire active cationique Partie 1: Matire activecationique haute masse molculaire (ISO 2871-1:2010)Traduction anglais
4、e de DIN EN ISO 2871-1:2010-06SupersedesDIN EN ISO 2871-1:1994-12www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.05.109DIN EN ISO 2871-1:2010-06 A comma is used as the decimal marker. National foreword This standard has been prepar
5、ed by Technical Committee CEN/TC 276 “Surface active agents” (Secretariat: AFNOR, France) in collaboration with Technical Committee ISO/TC 91 “Surface active agents” (Secretariat: ISIRI, Iran). The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials
6、Testing Standards Committee), Working Committee NA 062-05-62 AA Analytik von Tensiden. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 385 DIN EN ISO 385 ISO 607 DIN ISO 607 ISO 1042 DIN EN ISO 1042 ISO 2271 DIN ISO 2271 Amendments This
7、 standard differs from DIN EN ISO 2871-1:1994-12 as follows: a) Normative references have been updated. b) The standard has been editorially revised. Previous editions DIN EN ISO 2871-1: 1994-12 National Annex NA (informative) Bibliography DIN EN ISO 385, Laboratory glassware Burettes DIN EN ISO 104
8、2, Laboratory glassware One-mark volumetric flasks DIN ISO 607, Surface active agents and detergents Methods of sample division DIN ISO 2271, Surface active agents Detergents Determination of anionic-active matter (direct two-phase titration procedure) 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE
9、NORM EN ISO 2871-1 February 2010 ICS 71.100.40 Supersedes EN ISO 2871-1:1994English 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 m
10、atire active cationique Partie 1: Matire active cationique haute 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. CE
11、N 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 references concerning such national standards may be obtained on app
12、lication to the CEN 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 member into its own language and notified to the CEN Management Centre
13、 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
14、 Poland,Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, 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
15、by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2871-1:2010: E2DIN EN ISO 2871-1:2010-06 EN ISO 2871-1:2010 (E) Contents Page Foreword .3 1 Scope.4 2 Normative references.4 3 Principle 4 4 Reagents .5 5 Apparatus5 6 Sampling .5 7 Procedure5 7.1 Test portion.5 7.2 Determinat
16、ion .6 8 Expression of results.6 8.1 Calculation 6 8.2 Precision .6 9 Test report.73DIN EN ISO 2871-1:2010-06 EN ISO 2871-1:2010 (E) 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
17、 276 “Surface active agents” the secretariat of which 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 la
18、test by August 2010. Attention is drawn to the possibility 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
19、/CENELEC Internal Regulations, the national standards 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, Lit
20、huania, Luxembourg, Malta, Netherlands, Norway, Poland, 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. 1 Scope This part of ISO 2871 sp
21、ecifies a method for the determination of high-molecular-mass cationic-active materials such as a) quaternary ammonium 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 whi
22、ch long-chain acylaminoethyl and alkyl groups are substituted in the 1- and 2-positions, respectively. The method 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 i
23、f its content is expressed as a percentage by mass. The method is not applicable if anionic surface active agents 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 u
24、ndated references, the latest edition of the referenced document (including any amendments) applies. ISO 385, Laboratory 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
25、 agents Detergents Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure 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
26、 described in ISO 2271. 4DIN EN ISO 2871-1:2010-06 EN ISO 2871-1:2010 (E) 4 Reagents During the 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-
27、2-ol. 4.3 Sodium lauryl sulfate, standard volumetric solution, c(C12H25NaO4S) = 0,004 mol/l. See 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-gl
28、ass stopper. 5.2 Burette, 25 ml capacity, complying with the specifications for class A of ISO 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 accor
29、dance with the instructions given in ISO 607. 7 Procedure 7.1 Test portion Weigh, to the nearest 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 interf
30、erences: Low relative molecular mass sulfonates of toluene and xylene present as hydrotropes do 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. No
31、n-ionic surface active agents, soap, urea and the salts of (ethylenedinitrilo)tetraacetic acid 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
32、 than perborate shall be destroyed before the analysis, and the sample shall be completely soluble in water. 5DIN EN ISO 2871-1:2010-06 EN ISO 2871-1:2010 (E) 7.2 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 a
33、nd stir. Transfer to the 1 000 ml one-mark volumetric flask (5.3) and dilute 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
34、 the chloroform (4.1) and 10 ml of the mixed indicator solution (4.4). Fill 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 colou
35、red pink. As the end point approaches, the emulsions formed during shaking 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 mom
36、ent when the pink colour is completely discharged from the chloroform layer, 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, expresse
37、d as a percentage by mass, of cationic-active matter is given by the formula 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 ma
38、tter; V is the volume, in millilitres, of test solution A used for the titration; 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 th
39、e same analyst using the same apparatus should not exceed 1,5 % of the mean 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. 6DIN EN ISO 2871-1:2010-06 EN ISO 2871-1:2010 (E) 9 Test repo
40、rt The test report shall include the following information: 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 in this part of ISO 2871 or in the International Standards to which reference is made, as well as any operation regarded as optional. 7DIN EN ISO 2871-1:2010-06 EN ISO 2871-1:2010 (E)
