BS-4897-1-1983 ISO-777-1982.pdf
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1、BRITISH STANDARD BS 4897-1: 1983 ISO 777:1982 Trace metal contents of pulps Part 1: Method for determination of calcium content by edta titrimetric and flame atomic absorption spectrometric methods UDC 676.014.2:543.064:546.41 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:02:43 GMT+00:00
2、 2006, Uncontrolled Copy, (c) BSI BS 4897-1:1983 This British Standard, having been prepared under the direction of the Paper Standards Committee, was published under the authority of the Board of BSI and comes into effect on 29 July 1983 BSI 11-1999 First published as BS 4897 May 1973 First (Part)
3、revision as BS 4897-1 July 1983 The following BSI references relate to the work on this standard: Committee reference PAM/11 Draft for comment 81/61947 DC ISBN 0 580 13352 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Paper Standards
4、 Committee (PAM/-) to Technical Committee PAM/11 upon which the following bodies were represented: British Fibreboard Packaging Association British Paper and Board Industry Federation (PIF) British Printing Industries Federation British Wood Pulp Association Envelope Makers and Manufacturing Station
5、ers Association Her Majestys Stationery Office Man-made Fibres Producers Committee Ministry of Defence Paper Sack Development Association Ltd. Pira (The Research Association for the Paper and Board, Printing and Packaging Industries) Post Office Society of British Printing Ink Manufacturers Universi
6、ty of Manchester Institute of Science and Technology Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:02:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-1:1983 BSI 11-1999i Contents Page Committees responsibleInside fro
7、nt cover National forewordii 0Introduction1 1Scope and field of application1 2References1 3Method A: edta Titrimetric method1 4Method B: Flame atomic absorption spectrometric method3 5Test report5 Table 13 Table 23 Table 34 Publications referred toInside back cover Licensed Copy: sheffieldun sheffie
8、ldun, na, Fri Dec 01 09:02:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-1:1983 ii BSI 11-1999 National foreword This Part of this British Standard has been prepared under the direction of the Paper Standards Committee and is identical with ISO 777:1982 “Pulps Determination of calcium conten
9、t edta Titrimetric and flame atomic absorption spectrometric methods” published by the International Organization for Standardization (ISO). Parts 1, 2, 3 and 4 of this standard supersede BS 4897:1973 which is withdrawn. Part 2 of this standard is identical with ISO 778:1982 “Pulps Determination of
10、copper content Extraction-photometric and flame atomic absorption spectrometric methods”. Part 3 of this standard is identical with ISO 779:1982 “Pulps Determination of iron content 1,10-Phenanthroline photometric and flame atomic absorption spectrometric methods”. Part 4 of this standard is identic
11、al with ISO 1830:1982 “Pulps Determination of manganese content Sodium periodate photometric and flame atomic absorption spectrometric methods”. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation.
12、Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. The comma has been used as a decimal marker. In British Standards it is current practice to use a full point on the baseline as a decimal marker. Wherever
13、the words “International Standard” appear, referring to this Part of this standard, they should be read as “this Part of this British Standard”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct app
14、lication. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International StandardsCorresponding British Standards ISO 638:1978BS 4502:1980 Method for determination of dry-matter content of pulps (Identical) ISO 1762:1974BS 4896:1973 Metho
15、d for the determination of ash of pulp (Technically equivalent) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorpor
16、ated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:02:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-1:1983 BSI 11-19991 WARNING The methods specified in this International Standard involve the use of some h
17、azardous chemicals and of gases that can form explosive mixtures with air. Care shall be taken to ensure that the relevant safety precautions are observed. 0 Introduction In ISO Recommendation R 777, published in 1968, a titrimetric method was prescribed for the determination of the calcium content
18、of pulp. However, in practice, such determinations are frequently made by application of a flame atomic absorption procedure, if the equipment is available. As comparative tests have proved that similar results are obtainable by both methods, this International Standard provides guidance on the use
19、of flame atomic absorption spectrometric equipment as an alternative procedure. 1 Scope and field of application This International Standard specifies two methods for the determination of the calcium content of pulp, namely an edta titrimetric method (method A); a flame atomic absorption spectrometr
20、ic method (method B). These methods are applicable to all kinds of pulp. 2 References ISO 638, Pulps Determination of dry matter content. ISO 1762, Pulps Determination of ash. 3 Method A: edta Titrimetric method 3.1 Principle Ashing of the pulp and dissolution of the ash in hydrochloric acid. Titrat
21、ion of the test solution with a standard volumetric Na2H2edta solution at a pH in excess of 12, in the presence of a suitable indicator, interfering ions being masked by triethanolamine. 3.2 Reagents During the analysis, use only reagents of recognized analytical grade and only distilled water or wa
22、ter of equivalent purity. 3.2.1 Hydrochloric acid, about 6 mol/l solution. 3.2.2 Hydrochloric acid, about 1 mol/l solution. 3.2.3 Potassium hydroxide, about 8 mol/l solution. Store the solution in a polyethylene bottle. 3.2.4 2,2,2-Nitrilotriethanol Triethanolamine N(CH2CH2OH)3, 100 g/l solution. 3.
23、2.5 Hydroxylammonium chloride Hydroxylamine hydrochloride (HONH3Cl), 20 g/l solution. 3.2.6 Calcium, 0,01 mol/l standard reference solution. Weigh 1,00 0,01 g of calcium carbonate (CaCO3), dried at a temperature not exceeding 200 C, into a 500 ml beaker. Add 100 ml of water and from a burette add, d
24、rop by drop, the least amount (about 20 ml) of the hydrochloric acid solution (3.2.2) necessary to dissolve the calcium carbonate. Boil in order to expel the carbon dioxide, cool and, by rinsing with water, transfer the solution quantitatively to a 1 000 ml one-mark volumetric flask. Dilute to the m
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