BS-4897-4-1983 ISO-1830-1982.pdf
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1、BRITISH STANDARD CONFIRMED JULY 1993 BS 4897-4: 1983 ISO 1830:1982 Trace metal contents of pulps Part 4: Method for determination of manganese content by sodium periodate photometric and flame atomic absorption spectrometric methods UDC 676.014.2:543.064:546.711 Licensed Copy: sheffieldun sheffieldu
2、n, na, Fri Dec 01 09:02:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-4:1983 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 publish
3、ed as BS 4897 May 1973 First (Part) revision as BS 4897-4 July 1983 The following BSI references relate to the work on this standard: Committee reference PAM/11 Draft for comment 81/61952 DC ISBN 0 580 13355 9 Committees responsible for this British Standard The preparation of this British Standard
4、was 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 Envel
5、ope 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
6、 Printing Ink Manufacturers University of Manchester Institute of Science and Technology Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:02:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-4:1983 BSI 12-1999i Contents P
7、age Committees responsibleInside front cover National forewordii 0Introduction1 1Scope and field of application1 2References1 3Method A: Sodium periodate photometric method1 4Method B: Flame atomic absorption spectrometric method2 5Test report4 Table 12 Table 23 Publications referred toInside back c
8、over Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:02:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-4:1983 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 1830:198
9、2 “Pulps Determination of manganese content Sodium periodate 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 i
10、s identical with 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 me
11、thods”. Part 3 of this standard is identical with ISO 799:1982 “Pulps Determination of iron content 1,10-Phenanthroline photometric and flame atomic absorption spectrometric methods”. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as
12、 a British 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
13、baseline as 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 Standard
14、s are responsible 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 (Ide
15、ntical) ISO 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 dat
16、e) and may 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 09:02:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-4:1983 BSI 12-19991 WARNING The methods specified in this Internati
17、onal Standard 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 R 1830, published in 1970, a colorimetric method was prescribed for
18、the determination of the manganese 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 Internati
19、onal Standard provides 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 manganese content of pulp, namely a sodium periodate photometric
20、method (method A); a flame atomic absorption spectrometric method (method B). These two 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: Sodium periodate photometric method 3.1 Principle As
21、hing of the pulp and dissolution of the ash in hydrochloric acid. Oxidation of manganese(II) to manganese(VII) by means of sodium periodate in the presence of phosphoric acid. Photometric measurement at a wavelength of about 525 nm. 3.2 Reagents During the analysis, use only reagents of recognized a
22、nalytical grade and only distilled water or water of equivalent purity. 3.2.1 Sodium sulfite (Na2SO3), 50 g/l solution. 3.2.2 Hydrochloric acid, about 6 mol/l solution. 3.2.3 Sodium periodate-phosphoric acid, solution, containing 50 g of sodium periodate (NalO4) and 200 ml of phosphoric acid (H3PO4)
23、, 1,70 g/ml, per litre. 3.2.4 Manganese, standard solution corresponding to 0,1 g of Mn per litre. Weigh 0,274 9 g of manganese sulphate (MnSO4), dried at 300 C, and transfer to a 1 000 ml one-mark volumetric flask. Dissolve in water, dilute to the mark and mix. 1 ml of this solution contains 0,1 mg
24、 of Mn. 3.2.5 Manganese, standard solution corresponding to 0,01 g of Mn per litre. Transfer 100 ml of the standard manganese solution (3.2.4) to a 1 000 ml one-mark volumetric flask, dilute to the mark and mix. 1 ml of this standard solution contains 0,01 mg of Mn. This solution is not stable. 3.3
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