1、BSI BS*EN*ISO 4119 96 1624669 0570688 64T BRITISH STANDARD A Implementation of EN IS0 4119 : 1996 Pulps - Determination of stock concentration The European Standard EN IS0 4119 : 1996 has the status of a British Standard BS EN IS0 4119 : 1996 Incorporatiw Amendment No. 1 BSISO41IY: 1995 renumbered N
2、O COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW A the Standards Board and comes into effect on 15 October 1995 Amd. NO. 9266 BSI 1995 BSI BS*EN*ISO 4119 96 Lb24669 0570609 586 Date October Indicated by a sideline in the margin 1996 5 kL,-tc+A!c-U7, c, -3L . A BS EN IS0 4119 : 1
3、996 Issue 2, October 1996 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PAI/11, Methods of test for paper, board and pulps, upon which the following bodies were represented: British Apparel and Textile Confederation Bri
4、tish Carton Association British Fibreboard Packaging Association British Printing Industry Federation Envelope Makers and Manufacturing Stationers Association Her Majestys Stationery Office Institute of Paper Conservation Ministry of Defence Paper Federation of Great Britain Pira International Unive
5、rsity of Manchester Institute of Science and Technology The following BSI references relate to the work on this standard: Committee reference PAU11 DraR for comment 92/49480 DC ISBN O 580 24762 7 I I A - BSI BS*EN*ISO 4319 96 = 3624669 0570630 2T8 W Issue 1, October 1996 BS EN IS0 4119 : 1996 Summar
6、y of pages The following table identifies the current issue of each page. Issue 1 indicates that a page has been introduced for the first time by amendment. Subsequent issue numbers indicate an updated page. Vertical sidelining on replacement pages indicates the most recent changes (amendment, addit
7、ion, deletion). Page Front cover Inside front cover a b i ii EN cover page iib Change of identifier Issue 2 2 1 blank 2 blank 1 1 Page IS0 cover page 1 2 3 4 Inside back cover Back cover 11 Issue original original original original original blank blank 2 Wherever BS IS0 4119 : 1995 appears in this s
8、tandard, it should be read as BS EN IS0 4119 : 1996. * * m 0 BSI 1996 a * * m BSI BS*EN*ISO 4119 96 1624bb9 0570bLL 134 BS EN IS0 4119 : 1996 Issue 2, Octobvr 1996 National foreword This British Standard has been prepared by Technical Committee PAU11 and is the English language version of EN IS0 411
9、9 : 1996 Pulps - Determiitation of stock concentration, published by the European Committee for Standardization (CEN). It is identical with IS0 4119 : 1995 published by the International Organization (ISO). It supersedes BS 5878 : 1980, which is withdrawn. EN IS0 4119 : 1996 was produced as a result
10、 of international discussions in which the United Kingdom took an active part. EN IS0 4119 : 1996 has been approved by CEN member bodies under the weighted voting procedures introduced in 1988 to coincide with the introduction of New Approach Directives from the Commission of the European Community.
11、 This British Standard is published under the direction of the Sector Board for Materials and Chemicals whose Technical Committee PAI/ll has the responsibility to: - aid enquirers to understand the text; - present to the responsible international committee any enquiries on interpretation, or proposa
12、ls for change, and keep UK interests informed; - monitor related international and European developments and promulgate them intheuK. NOTE. International and European Standards, as weil as overseas standards, are available from Customer SeMces. BSI, 389 Chiswick High Road, London W4 4AL. Compliance
13、with a British Standard does not of itself confer immunity from legai obligations. 1 0 BSI 1996 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM A EN IS0 April 1996 4119 ICs 85.040 Descriptors: Paper pulps, tests, determination of content, dry matter English version Pulps - Determination of stock c
14、oncentration (IS0 4119 : 1995) Ptes - Dtermination de la concentration en pte (IS0 4119 : 1995) Halbstoffe - Bestimmung der Stoffdichte (IS0 4119 : 1995) This European Standard was approved by CEN on 1996-04-05. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate
15、 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 Central Secretariat or to any CEN member. This European Standard exists
16、 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodie
17、s of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Centrai Secret
18、ariat: rue de Stassart, 36 B-1050 Brussels 1996 All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its members. Ref. No. EN IS0 4119 : 1996 E A EN IS0 4119 : 1996 f2 BSI BS*EN*ISO 4LL 96 Lb24bb 05706113 TO7 m Issue 1, October 1996 Foreword
19、The text of the International Standard from Technical Committee ISOITC 6, Paper, board and pulp, of the International Organization for Standardization (ISO) has been talen over as a European Standard by Technical Committee CEN/TC 172, Pulp, paper and board, the secretariat of which is held by DIN. T
20、his 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 October 1996, and conflicting national standards shall be withdrawn at the latest by October 1996. According to the CENKENELEC Internal kgulations, t
21、he national standards 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. iib 8 BSI
22、1996 I NT E R NAT I O N AL STANDARD IS0 41 I9 Second edition 1995-06-01 Pulps - Determination of stock concentration Ptes - Dtermination de la concentration en pte Reference number IS0 41 19:1995(E) IS0 41 19:1995(E) Foreword IS0 (the International Organization for Standardization) is a worldwide fe
23、deration of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 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 com
24、mittee. International organizations, governmental and nongovernmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the t
25、echnical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 41 19 was prepared by Technical Committee ISOflC 6, Paper, board and pulps, Subcommittee SC
26、5, Test methods and quality specifications for pulp. This second edition cancels and replaces the first edition (IS0 41 19: 1978). of which it constitutes a technical revision. Q IS0 1995 Ail rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in an
27、y form or by any means, electronic or mechanical. including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 0 CH-1 21 1 Genve 20 Switzerland Printed in Switzerland II INTERNATIONAL STANDARD - IS0 4119:1995(E
28、) Pulps - Determination of stock concentration 1 Scope This International Standard specifies a method for determining the stock concentration of aqueous pulp suspensions. It is used in laboratory procedures for the determination of other pulp properties and is referred to in a range of other IS0 sta
29、ndards where pulp suspensions are involved. It is not intended for determining the saleable mass of slush pulps. In principle, this method is applicable to all kinds of aqueous pulp suspensions. 2 Definitions For the purposes of this International Standard, the following definitions apply. 2.1 stock
30、: Aqueous suspension of one or more pulps, which may contain fillers and additives. 2.2 stock concentration: Ratio of the oven-dry mass of material that can be filtered from a stock sample, to the mass of unfiltered sample, when determined as specified in this International Standard. NOTE 1 In this
31、International Standard, the stock concen- tration is expressed as a percentage by mass I% (dm). 3 Apparatus Ordinary laboratory apparatus and 3.1 Weighing containers, of sufficient size for weighing the stock sample or the filter (see clause 5, note 4). 3.2 Balance, capable of weighing a mass of 100
32、 g to 500 g with an error of less than 0,l %. 3.3 Filtering device, such as a Bchner funnel, of diameter 90 mm to 150 mm, a large filtering flask, and circular filter paper to fit the funnel; the paper shall be such that all visible fibre and inorganic material will be retained. 3.4 Means for drying
33、 the sample, for example suitable drying oven or hotplate. The temperature of the drying oven shall be 105 OC k 2 OC and that of the hotplate 150 OC f 15 OC. NOTES 2 A microwave oven may optionally be used if the operating conditions (power setting and drying time) are experimentally determined to p
34、roduce the same drying effect on pulp as produced by a normal drying oven. Incorrect operating conditions may cause charring of the sample. 3 A temperature of 150 OC for the hotplate may be too high for some pulps and cause charring of the sample. 3.5 Balance, capable of weighing the dried mat of fi
35、bres with an error of less than 0.1 YO. 4 Sampling and sample preparation 4.1 General Mix the stock thoroughly, and stir it while the sample is being taken. Samples shall be removed with a suitable vessel by a scooping action, to minimize the separation of fibres from the water. The entire sample ma
36、y be obtained in one dipping action, or several smaller samples may be combined, but all of the stock removed shall be included in the sample to be weighed. Incorrect sampling techniques can introduce significant errors at higher concentrations. Take samples for two determinations, or as many as are
37、 indicated in the test method for which the determination of stock concentration is being made. 1 BSI BS*EN*ISO 4119 96 1624669 0570637 6.52 W IS0 4119:1995(E) 4.2 Stock concentrations less than 03 ?“O (dm) of fibres carefully from the funnel, taking care that all the solid matter from the funnel wa
38、lls is included. Dry Take a sample of at least 500 g (500 ml), and and weigh the mat of fibres and the filter paper as sufficient to ensure a mass of ovendry fibre of specified above, using the same procedure as when between 1 g and 5 g. Weigh the sample in a tared drying and weighing the filter pap
39、er. Record the mass container (3.1) and determine the net mass (m,) with (m5). an error of less than 0,5 g, using the balance (3.2). 6 Expression of results The stock concentration X, expressed as a percentage by mass, is given by the formula 4.3 Stock concentration between 03 % (dm) and 1 % (dm) Ta
40、ke a sample of approximately 500 g, pour it into a tared container (3.1) and determine the net mass (m,) with an error of less than 0.5 g, using the balance X= mg -m4 x100 m1 (3.2). 4.4 Stock concentration more than 1 % (dm) Take a sample of approximately 500g. pour it into a tared container (3.1) a
41、nd determine the net mass (ml) with an error of less than 0,5g, using the balance (3.2). Dilute with water, the mass of which (m2) is known with an error of less than 0.5 %, to give a stock concentration of less than 1 %. Mix thoroughly, take an aliquot of about 500g, pour into a tared container (3.
42、1) and determine the mass (m3) of the aliquot. 5 Procedure Dry a filter paper (3.3) in a drying oven or on a hotplate (3.4) at the appropriate temperature to constant mass. Weigh it immediately and record the mass (m4). Carry out all weighings to the nearest 0,Ol g. The filter paper is considered as
43、 having reached constant mass when two consecutive weighings do not differ by more than 0,Ol g. In all cases the drying period between two consecutive weighings shall be no longer than necessary, but at least one-fourth of the total drying time previously applied. NOTE 4 Weighing of the dried filter
44、 paper can also be carried out after cooling in a tared container (3.1). Place the filter paper in the Bchner funnel (see 3.3). and wet it. Apply suction and filter the stock sample (see clause 4) contained in the measuring cylinder or a tared container (3.11, rinse the inner walls of the cylinder o
45、r container, and add the rinsings to the funnel. Make sure that the filtrate is clear and, if not, filter again through the same filter, or run another test, with a denser filter paper. Wash the mat of fibres with successive small quantities of distilled or deionized water. Remove the filter paper a
46、nd the mat where ml is the mass, in grams, of the initial sample taken; m4 is the dry mass, in grams, of the filter paper; is the dry mass, in grams, of the fibre mat and filter paper. m5 If the sample has been prepared according to 4.4, the stock concentration is given by the formula m5 -m4 ml +L!
47、xloo X= m1 m3 where ml is the mass, in grams, of the initial sample taken; m2 is the amount of water added to dilute the initial sample taken, in grams; is the mass of the aliquot taken, in grams; m3 m4 is the dry mass, in grams, of the filter is the dry mass, in grams, of the fibre mat and filter p
48、aper. paper; rn5 Report the result as the mean of the determinations to two decimal places. 7 Testreport The test report shall include the following information: a) reference to this International Standard; b) all the information necessary for complete identification of the sample; 2 BSI BS*EN*ISO 4
49、119 96 1624669 0570628 599 IS0 41 19:1995(E) c) the stock concentration, expressed as a e) any operations not specified in this International percentage by mass; d) any unusual features observed in the course of the test; Standard, which might have affected the results. 3 BSI BS*EN*ISO 4339 96 3624667 0570639 425 = A BS EN IS0 4119 : 1996 BSI 389 Chiswick High Road London w4 4AL Issue 2, October 1996 BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the
