BS-4897-3-1983 ISO-779-1982.pdf
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1、BRITISH STANDARD CONFIRMED JULY 1993 BS 4897-3: 1983 ISO 779:1982 Trace metal contents of pulps Part 3: Method for determination of iron content by 1,10-phenanthroline photometric and flame atomic absorption spectrometric methods UDC 676.014.2:543.064:546.72 Licensed Copy: sheffieldun sheffieldun, n
2、a, Fri Dec 01 09:02:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-3:1983 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 12-1999 First published a
3、s BS 4897 May 1973 First (Part) revision as BS 4897-3 July 1983 The following BSI references relate to the work on this standard: Committee reference PAM/11 Draft for comment 81/61951 DC ISBN 0 580 13354 0 Committees responsible for this British Standard The preparation of this British Standard was
4、entrusted by the Paper Standards 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
5、Makers and Manufacturing Stationers 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 Pri
6、nting Ink Manufacturers University of Manchester Institute of Science and Technology Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:02:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-3:1983 BSI 12-1999i Contents Page Committee
7、s responsibleInside front cover National forewordii 0Introduction1 1Scope and field of application1 2References1 3Method A: 1,10-Phenanthroline photometric method1 4Method B: Flame atomic absorption spectrometric method3 5Test report4 Table 12 Table 23 Publications referred toInside back cover Licen
8、sed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:02:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-3:1983 ii BSI 12-1999 National foreword This Part of this British Standard has been prepared under the direction of the Paper Standards Committee and is identical with ISO 779:1982 “Pulps De
9、termination of iron content 1,10-Phenanthroline photometric 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 1 of this standard is identical w
10、ith ISO 777:1982 “Pulps Determination of calcium content edta Titrimetric and flame atomic absorption spectrometric methods”. Part 2 of this standard is identical with ISO 778:1982 “Pulps Determination of copper content Extraction-photometric and flame atomic absorption spectrometric methods”. Part
11、4 of this standard is identical 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
12、 Standard without deviation. 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 a
13、s a decimal marker. Wherever 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 resp
14、onsible for their correct application. 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) IS
15、O 1762:1974BS 4896:1973 Method 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 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may
16、 have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:02:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-3:1983 BSI 12-19991 WARNING The methods specified in this International Stand
17、ard involve the use of some hazardous 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 779, published in 1968, a colorimetric method was prescribed for the determina
18、tion of the iron content 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 prov
19、ides guidance on the use 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 iron content of pulp, namely a 1,10-phenanthroline photometric method (method A); a
20、 flame atomic absorption spectrometric 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: 1,10-Phenanthroline photometric method 3.1 Principle Ashing of the pulp and
21、dissolution of the ash in hydrochloric acid. Reduction of the trivalent iron with hydroxylammonium chloride. Formation of a complex between iron(II) and 1,10-phenanthroline in a buffered medium and photometric measurement of the coloured complex at a wavelength of about 510 nm. 3.2 Reagents During t
22、he analysis, use only reagents of recognized analytical grade and only distilled water or water of equivalent purity. 3.2.1 Sodium acetate trihydrate (NaCOOCH3.3H2O), 540 g/l solution. 3.2.2 Hydroxylammonium chloride Hydroxylamine hydrochloride (HONH3Cl) 20 g/l solution. 3.2.3 1,10-phenanthroline hy
23、drochloride monohydrate (C12H8N2.HCl.H2O), 10 g/l solution. This reagent may be replaced by the corresponding quantity of 1,10-phenanthroline monohydrate (C12H8N2.H2O). Store the solution away from light. Use only colourless solutions. 3.2.4 Hydrochloric acid, about 6 mol/l solution 3.2.5 Iron, stan
24、dard solution, corresponding to 0,1 g of Fe per litre. Dissolve 0,100 g of pure iron wire in the smallest possible quantity of hydrochloric acid, 1,19 g/ml, in a 1 000 ml one-mark volumetric flask. Dilute to the mark and mix. 1 ml of this standard solution contains 0,1 mg of Fe. 3.2.6 Iron, standard
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