1、BRITISH STANDARD Non-ionic surface active agents - Determination of cloud point index - Volumetric method IS0 4320 : 1977, including Erratum : 1980) The European Standard EN IS0 4320 : 1997 has the status of a British Standard ICs 71.100.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY CO
2、PYRIGH LAW BS EN IS0 4320 : 1998 STD-BSI BS EN IS0 4320-ENGL 1798 lb2Libb7 Ob87023 433 Amd. No. BS EN IS0 4320 : 1998 Date Text affected National foreword This British Standard is the English language version of EN IS0 4320 : 1997. It is derived from IS0 4320 : 1977, incorporating Erratum : 1980. It
3、 supersedes BS 6829 : Section 4.4 : 1989 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee CII/34, Methods of test for surface active agents, which has the responsibility to: - aid enquirem to understand the te*, - present to the responsible internatio
4、- monitor related internationai and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally incl) ide an annex which
5、 lists nonnative references to international publications with tl ir corresponding European publications. The British Standards which implemen, these international or European publications may be found in the BSI Standards Cataiogue under the section entitled International Standards Correspondenct I
6、ndex, or by using the Find facility of the BSI %dards Electronic Catalog; P. A British Standard does not purport to include all the necessary provisions a contract. Users of British Standards are responsible for their correct applic $on. Compliance with a British Standard does not of itself confer i
7、mm mity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN IS0 page, the EN IS0 foreword page, the IS0 title page, the IS0 foreword page, pages 1 to 3 and a back cover. This British Standard, having been prepared under the direction of the S
8、ector Board for Materiais and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 March 1998 O BSI 1998 ISBN O 680 29123 6 _ STD.BS1 BS EN IS0 4320-ENGL 1998 m Lb2LibbS b87024 37T m EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 4320 May 1997 ICs
9、 71.100.40 Descriptors: see IS0 document English version Non-ionic surface active agents - Determination of cloud point index - Volumetric method (IS0 4320: 1 977, Including Erratum: 1 980) Agents de surface non ioniques - Dtermination de lindice de trouble - Mthode volmtrique (IS0 4320:1977, Erratu
10、n:1980 inclus) Nichtionische Tenside - Bestimg der Trbungstitrationszahl - Volunetrisches Verfahren (IS0 4320: 1977, einschl i eB1 i ch Erratun: 1980) This European Standard was approved by CEN on 1997-04-06. CEN members are bound to canply with the CEN/CENELEC Internal Regulations which stipulate t
11、he 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 Central Secretariat or to any CEN menber. The European Standards exist in
12、 three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEM m#nber into its own language and notified to the Central Secretariat has the same status as the official versions. CEN hrs are the national standards bodies of Au
13、stria, Belgiun, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxmibwrg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Comnittee for Standardization Comit Europen de Normalisation Europisches Komi tee fr Normung Central Secretariat:
14、rue de Stassart.36 8-1050 Brusisels O 1997 CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN IS0 4320:1997 E - STD*BSI BS EN IS0 9320-ENGL I778 Lb24bb7 Ob87025 20b EN IS0 4320 : 1997 Foreword The text of the International Standard
15、from Technical Committee ISO/TC 9 1 “Surface active agents“ of the International Organization for Standardization (IS01 has been taken over as an European Standard by Technical Committee CEN/TC 276 “Surface active agents“, the secretariat of which is held by AFNOR. I This European Standard shall be
16、given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by month of November 1997, and conflicting national standards shall be withdrawn at the latest by November 1997. According to the CENKENELEC Internal Regulations, the national standar
17、ds organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text o
18、f the International Standard IS0 4320: 1977, Including Erratum: 1980 has been approved by CEN as a European Standard without any modification. STD-BSI BS EN IS0 V320-ENGL 1778 m 1b24bb7 Ob8702b 142 EN IS0 4320 : 1997 INTERNATIONAL STANDARD 4320 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION .MEXLLYH
19、APOIIHAR OPrAHH3AUHR II0 CTAHMPTH3AUHH *ORGANISATION INTERNATIONALE DE NORMALIUTION Non-ionic surface active agents - Determination of cloud point index - Volumetric method Agents de surface non ioniques - Determination de lindice de trouble - Mthode volumtrique First edition - 1977-02-01 UDC 661.18
20、5 : 543 Ref. No. IS0 4320-1977 (E) Descriptors : surfactants, non-ionic surfactants, tests, determination, cloud point, volumetric analysis. Price based on 3 pages STD-BSI BS EN IS0 4320-ENGL 1998 lb24bb9 Ob89027 087 EN IS0 4320 : 1997 FOREWORD IS0 (the International Organization for Standardization
21、) is a worldwide federation of national standards institutes (IS0 member bodies). The work of developing International Standards is carried out through IS0 technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented
22、on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by
23、 the IS0 Council. International Standard IS0 4320 was drawn up by Technical Committee ISO/TC 91, Surface active agents, and was circulated to the member bodies in October 1975. It has been approved by the member bodies of the following countries : Austria Belgium Brazil Ca nada France Germany Hungar
24、y I nd ia Iran Italy Japan Korea, Dem. P. Rep. of Mexico Netherlands New Zealand Poland No member body expressed disapproval of the document. Portugal Romania South Africa, Rep. of Spain Switzerland Turkey United Kingdom U.S.A. Descriptors : surfactants, non-ionic surfactants, tests, determination,
25、cloud point, volumetric analysis. STD-BSI BS EN IS0 V320-ENGL 1798 = Lb2LibbS 0b87028 TL5 EN IS0 4320 : 1997 Non-ionic surface active agents - Determination of cloud point index - Volumetric method O INTRODUCTION Determination of the cloud point index provides a way of characterizing weakly alkoxyla
26、ted derivatives and their hydrocarbon hydrophobic groups. This simple and rapid measurement is a valuable means for checking the level of alkoxylation of non-ionic derivatives intended, for example, for sulphonation. 1 SCOPE This International Standard specifies a volumetric method for the determina
27、tion of the cloud point index of non-ionic surface active agents. 2 FIELD OF APPLICATION The method is applicable to weakly alkoxylated non-ionic surface active agents (1 to 5 oxyethylene groups) the hydrophobic group of which is provided by an alcohol, an alkylphenol or a fatty acid (provided that
28、the last has a melting point lower than 3OoC), subject to the product being soluble in propan-1-01 to the extent of 1 g in 10 ml at 30 C. It is equally applicable to lipophilic bases derived from alcohols, alkylphenols and fatty acids. 3 REFERENCE IS0 607, Surface active agents - Detergents - Method
29、s of sample division. 1 ) 4 DEFINITION For the purposes of this International Standard, the following definition applies : cloud point index : The number of millilitres of distilled water necessary to render cloudy, at a specified tem- perature, a solution containing a given mass of surface active a
30、gent in a given volume of solvent. 5 PRINCIPLE Addition, at 30 OC, of distilled water to a propanol solution of the surface active agent until the appearance of cloud i ness. 6 REAGENTS 6.1 Distilled water. 6.2 Propan-1-01, complying with the following require- ments : assay (by gas chromatography)
31、99 % (m/m); density p20 0,804 to 0,805 g/mI; refractive index ni 1,384 to 1,385; non-volatile matter 0,005 % (m/m); free acidity (expressed as C2H5COOH) 0.01% (mim); - water (determined by the Karl Fischer method; see IS0 760) 0,2 % (m/m). 7 APPARATUS Ordinary laboratory apparatus, and in particular
32、 : 7.1 Beaker (see the figure) of height 80 mm and diameter 50 mm, with double walls permitting temperature stability, and having a mass less than 200g. fitted with a poly- ethylene, polytetrafluoroethylene or an aluminium foil cover pierced with two holes allowing entry of the ther- mometer (7.2) a
33、nd the burette (7.4). 11 In preparation. (Revision of ISOIR 607.1 1 STD-BSI BS EN IS0 4320-ENGL 1778 1b24bb7 0b87027 751 W EN IS0 4320 : 1997 50 mm * E E O Co I 1 Direction of water circulation I FIGURE - Doublewalled beaker Fit the beaker (7.1) onto the water bath (7.7) and control the temperature
34、at 30.0 f 0,1 C. Start the water circulation and the stirrer (stir gently at first in order to avoid splashing the liquid on the walls of the beaker). Ensure that the test portion is completely dissolved (the solution should be clear) and add, drop by drop, the water (6.1) from the burette (7.4) unt
35、il the liquid remains cloudy. Check that the temperature in the beaker is maintained at 30,O f 0,5 OC during the complete operation. The results of the test depend upon the speed of introduc- tion of the water. Hence, the period during which it is introduced should be between 20 and 30 min, accordin
36、g to the quantity of water introduced. Immediately after the cloud point is reached, allow the solution to equilibrate for 5min so as to verify that the turbidity does not disappear. 7.2 Thermometer, STC/0,1/29/41, complying with the requirements of ISO/R 654. 10 EXPRESSION OF RESULTS 7.3 One-mark p
37、ipette, capacity 10 ml, complying with the requirements of IS0 648. 10.1 Method of calculation 7.4 Burette, capacity 50 ml, complying with the require- ments of class A of IS0 385. 7.5 Magnetic stirrer. 7.6 Bar magnet, coated with polytetrafluoroethylene. 7.7 Water bath, with circulation, capable of
38、 being controlled to within t 0,l “C. 8 SAMPLING The laboratory sample of the non-ionic surface active agent shall be prepared and stored according to the instructions in IS0 607. 9 PROCEDURE 9.1 Test portion Weigh 1,0 f 0,l g of the laboratory sample into the beaker (7.1), previously weighed to the
39、 nearest 0,Ol g. 9.2 Determination Add 10ml of the propan-l-ol (6.2) to the beaker (7.1) containing the test portion (9.1 1. Introduce the bar magnet (7.6). place the beaker fitted with its cover on the magnetic stirrer (7.5) and insert the thermometer (7.2). The cloud point index of the product is
40、expressed as the volume, in millilitres, of water added by the procedure specified in clause 9 to render opaque the solution of non- ionic surface active agent. Take as the result the mean of at least three determinations, expressed to the nearest 0,05 ml (1 drop of water). 10.2 Repeatability The ma
41、ximum difference between the results of two deter- minations carried out in rapid succession on the same sample, by the same analyst using the same apparatus, should not exceed 2 % of the mean volume found. 10.3 Reproducibility The difference between results obtained on the same sample in two differ
42、ent laboratories should not exceed 5 % of the mean volume found. 11 TEST REPORT The test report shall include the following particulars : a) all information necessary for the complete identi- fication of the sample; 2 O BSI i998 STD-BSI BS EN IS0 q320-ENGL 1998 lb2Libb7 Ub87030 b73 W EN IS0 4320 : 1
43、997 b) the reference to the method used; c) the results obtained and the form in which they are expressed; d) the conditions of test : - the temperature of the water bath, - the temperature of the solution of the product at the moment the turbidity appears, - the time taken to dissolve the product,
44、- the exact length of time during which distilled water is introduced, - the length of the determination, - the nature of the change from clear to cloudy, namely if the change is sharp or if there is a state of opalescence before cloudiness, - the mass of the test portion; e) any operation not inclu
45、ded in this International Standard or regarded as optional, as well as any incidents which may have affected the results. O BSI 1998 3 - STD-BSI BS EN IS0 4320-ENGL 1778 1b24bbS Ob87031 50T BS EN IS0 4320 : 1998 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the
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