1、 - - STD.BS1 BS EN IS0 3262-1-ENGL 1998 1624bb9 0720799 98b BRITISH STANDARD Extenders for paints - Specifications and methods of test - Part 1: Introduction and general test methods The European Standard EN IS0 3262-1: 1998 has the status of a British Standard ICs 87.060.10 NO COPYING WITHOUT BSI P
2、ERMISSION EXCEPT AS PERMITTED BY COPYRIGH LAW BS EN IS0 3262-11998 STDoBSI ES EN IS0 3262-1-ENGL 1998 = Lb24bb9 O720800 Y28 been prepared under the direction of the Sector Board for Amd. No. Date Materials and Chemicals, was published under the authority of the Standards Board and comes into effect
3、on 15 September 1998 1 O BSI 1998 ISBN O 680 30437 X BS EN IS0 3262-1:1998 Text affected National foreword This British Standard is the English language version of EN IS0 3262-1: 1998. It is identical with IS0 3262-1:1997. Together with the other parts of BS EN IS0 3262, it will supersede BS 1795197
4、6 which is declared obsolescent. The UK participation in its preparation was entrusted to Technical Committee SWl, Pigments, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible irrk - monitor related international and European developments and promul
5、gate them in the UK. A list of organizations represented on this commitLee can be obtained on request to its secretaxy. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their c
6、orresponding European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Stcuidasds Correspondence Index”, or by using the “Find” facility of the
7、 BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summ
8、ary of pages This document comprises a front cover, an inside front cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, pages ii and iii, a blank page, pages 1 to 7, the annex ZA page, an inside back cover and a back cover. STD-BSI BS EN IS0 3262-1-ENGL 1998 = 3624669 0720801
9、 364 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM June 1998 ICs 87.060.1 O Descriptors: see IS0 document English version Extenders for paints - Specifications and methods of test - Part 1 : Introduction and general test methods (IS0 3262-1 :1997) Matires de charge pour peintures - Spcifications
10、 et mthodes dd - Partie 1 : Introduction et mthodes dessai m, is the mass, in grams, of the test portion after ignition. 3, Determination of loss on ignition of aluminium hydroxides in accordance with IS0 3262-16. 3 STD-BSI BS EN IS0 32b2-L-ENGL 1778 Lb24b7 0720807 655 EN IS0 3262-1:1998 5.3 Determi
11、nation of calcium and magnesium contents 5.3.1 Reagents During the analysis, use only reagents of recognized analytical grade and only water of at least grade 3 purity as defined in IS0 3696. 5.3.1.1 Hydrochloric acid, c(HCI) = 6 mol/l. 5.3.1.2 Ammonia solution, approximately 32 % (m/m), p = 0,880 g
12、/ml. 5.3.1.3 Potassium hydroxide solution, c(K0H) = 4 mol/l. 5.3.1.4 Ammonium chloride. 5.3.1.5 Sodium chloride. 5.3.1.6 EDTA, standard volumetric solution, c(EDTA) = 0,05 mol/l. Dissolve 18,6126 g of disodium ethylenediamine tetraacetate dihydrate (EDTA disodium salt) in water in a 1 O00 ml one-mar
13、k volumetric flask, dilute to the mark and mix well. Standardize the solution against a standard magnesium solution, using the procedure described in 5.3.3.3. 5.3.1.7 Calcon4) indicator (or other appropriate indicator). Grind 1 part of Calcon with 99 parts of anhydrous sodium sulfate to a fine powde
14、r. 5.3.1.8 Mordant black II (Eriochrome Black T)5) (or other appropriate indicator). Grind 1 part of Mordant black II with 99 parts of sodium chloride to a fine powder. ! I I 5.3.1.9 Indicator paper, pH 9,5 to 13. 4, Calcon is a registered trade name for sodium-1 -(2-hydoxy-1 -naphthylazo)-2- naphth
15、yl-4-sulfonate. 5, Mordant black II and Eriochrome black T are registered trade names for sodium- 1 4 1 -hydroxy-2-naphthylazo)-6-nitronaphthalene-4-sulfonate. 4 EN IS0 3262-1:1998 5.3.2 Apparatus Use ordinary laboratory apparatus and glassware complying with the requirements of IS0 385-1, IS0 648 a
16、nd IS0 1042. 5.3.3 Procedure 5.3.3.1 Preparation of filtrate Weigh, to the nearest 0,l mg, about 0,5 g of the test sample, previously dried in accordance with IS0 787-2, into a beaker. Moisten with a little water, add 7 ml of the hydrochloric acid (5.3.1.1 1, cover the beaker with a watch glass and
17、boil for a few minutes until dissolution is complete. Dilute to 100 ml. Add 3 g of the ammonium chloride (5.3.1.4) and neutralize with ammonia solution (5.3.1.2). Then add 1 ml excess of the ammonia solution to precipitate iron and aluminium. Boil, filter rapidly, and wash the precipitate with hot w
18、ater. Collect the filtrate and washings, acidify slightly, and dilute to 500 ml in a one-mark volumetric flask. 5.3.3.2 Determination of calcium content 5.3.3.2.1 Titration By means of a pipette, transfer 100 ml of the filtrate obtained in 5.3.3.1 to a 400 ml beaker. Dilute to about 250 ml, and add
19、approximately 10 ml of the potassium hydroxide solution (5.3.1.3) in order to obtain a pH value of between 12 and 13. Add 0,2 g to 0,4 g of the Calcon indicator (5.3.1.7). If the calcium carbonate content of pure calcium carbonate is being determined, add a small amount of a soluble magnesium salt a
20、t this stage to intensify the colour of the solution during the subsequent titration. Titrate with the EDTA solution (5.3.1.6) with constant stirring until the colour changes from wine-red to clear blue, Record the volume of EDTA solution used w,. 5.3.3.2.2 Expression of results Calculate the calciu
21、m content, expressed as a percentage of mass of calcium carbonate, w(CaCO,), using the equation s0,W x V, x T m w(CaCqJ = 5 - STD.BS1 BS EN IS0 3262-II-ENGL 1998 1624669 0720811 203 m EN IS0 3262-1:1998 where Vi is the volume, in millilitres, of the EDTA solution (5.3.1.6) used; m is the mass, in gr
22、ams, of the test portion; T is the exact concentration, in mol/l, of the EDTA solution (5.3.1.6). 5.3.3.3 Determination of magnesium content NOTE 2 By titration of the filtrate obtained in 5.3.3.1 against the same EDTA solution as used in 5.3.3.2.1 for calcium but using Mordant black II as indicator
23、 and a different pH value, the magnesium and calcium contents may be determined together. The magnesium content is then determined by subtraction of the calcium content. 5.3.3.3.1 Titration By means of a pipette, transfer 100 ml of the filtrate obtained in 5.3.3.1 to a 400 rnl beaker and dilute with
24、 water to about 250 ml. Add ammonia solution (5.3.1.2) to adjust the pH value to between 1 O and 1 1 (up to 20 ml may be required). Titrate with the EDTA solution (5.3.1.6). Add the Mordant black II indicator (5.3.1.8) towards the end of the titration. The end-point is reached when the colour change
25、s from wine-red to blue. Record the volume of EDTA solution used ( V2) NOTE 3 The change in colour is not so marked as for the titration of calcium compounds using Calcon as indicator. 5.3.3.3.2 Expression of results Calculate the magnesium content, expressed as a percentage by mass of magnesium car
26、bonate, w(MgCO,), using the equation where m is the mass, in grams, of the test portion; V, is the volume, in millilitres, of the EDTA solution (5.3.1.6) used in 5.3.3.2.1 ; I l 6 STDoBSI BS EN IS0 32bZ-L-ENGL 1998 m Lb24bb9 0720832 L4T m EN IS0 3262-11998 Vz is the volume, in millilitres, of the ED
27、TA solution (5.3.1.6) added in 5.3.3.3.1 ; T is the exact concentration, in mol/l, of the EDTA solution (5.3.1.6). 7 STD=BSI BS EN IS0 32b2-3-ENGL 3998 I 1624667 0720833 O8b EN IS0 3262-1:1998 Annex ZA (normative) Normative references to international publications with their relevant European public
28、ations This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of th
29、ese publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to appies. Publication - Year IS0 787-2 1981 IS0 3696 1987 Title - EN - Year General methods of test for EN IS0 787-2 1995 pig
30、ments and extenders - Part 2: Determination of matter volatile at 105 OC - Specification and test methods Water for analytical laboratory use EN IS0 3696 1995 BS EN IS0 3262-k1998 _ STDmBSI BS EN IS0 32b2-L-ENGL L998 I Lb24bb9 07208L4 TL2 I BSI 389 Chiswick High Road London / w44AL 1 BSI - British S
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