BS-4897-2-1983 ISO-778-1982.pdf
《BS-4897-2-1983 ISO-778-1982.pdf》由会员分享,可在线阅读,更多相关《BS-4897-2-1983 ISO-778-1982.pdf(10页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS 4897-2: 1983 ISO 778:1982 Trace metal contents of pulps Part 2: Method for determination of copper content by extraction-photometric and flame atomic absorption spectrometric methods UDC 676.014.2:543.064:546.56 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:02:48 GMT+
2、00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-2:1983 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 as BS 4897 May 1973 First (P
3、art) revision, as BS 4897-2 July 1983 The following BSI references relate to the work on this standard: Committee reference PAM/11 Draft for comment 81/61950 DC ISBN 0 580 13353 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Paper Sta
4、ndards 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 S
5、tationers 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 Un
6、iversity of Manchester Institute of Science and Technology Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:02:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-2:1983 BSI 12-1999i Contents Page Committees responsibleInsi
7、de front cover National forewordii 0Introduction1 1Scope and field of application1 2References1 3Method A: Extraction-photometric method1 4Method B: Flame atomic absorption spectrometric method3 5Test report4 Table 12 Table 23 Publications referred toInside back cover Licensed Copy: sheffieldun shef
8、fieldun, na, Fri Dec 01 09:02:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-2:1983 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 778:1982 “Pulps Determination of copper cont
9、ent Extraction-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 with ISO 777:1982 “Pulps Determina
10、tion of calcium content edta Titrimetric 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 iden
11、tical 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 deviatio
12、n. 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. Wherev
13、er 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 a
14、pplication. 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 Met
15、hod 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 have had amendments incorp
16、orated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:02:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4897-2:1983 BSI 12-19991 WARNING The methods specified in this International Standard involve the use of some
17、 hazardous chemicals and of gases that can form explosive mixtures with air. Care shall be take to ensure that the relevant safety precautions are observed. 0 Introduction In ISO Recommendation R 778, published in 1968, a colorimetric method was prescribed for the determination of the copper 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 copper content of pulp, namely an extraction-photometric method (method A); a flame atomic absorption spect
20、rometric 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: Extraction-photometric method 3.1 Principle Ashing of the pulp and dissolution of the ash in hydrochloric
21、acid. Extraction of the copper with sodium diethyldithiocarbamate in carbon tetrachloride, followed by photometric measurement at 435 nm, interfering ions being masked by Na2H2edta. 3.2 Reagents During the analysis, use only reagents of recognized analytical grade and only distilled water or water o
22、f equivalent purity. NOTEThe copper content of the distilled water must be below 0,01 mg/kg. If the absorbance of the blank test solution (3.5.4) compared with that of the carbon tetrachloride (3.2.1) exceeds 0,05, the quality of the water or of one or more of the reagents may be suspect. 3.2.1 Carb
23、on tetrachloride (CCl4) 3.2.2 Ammonia, concentrated solution, 0,91 g/ml. 3.2.3 Disodiumdihydrogen ethylene-dinitrilo tetraacetate (Na2H2edta), 50 g/l solution. Dissolve 50 g of the Na2H2edta in water in a 1 000 ml one-mark volumetric flask, dilute to the mark and mix. Store the solution in a polyeth
24、ylene bottle. 3.2.4 Sodium diethyldithiocarbamate trihydrate, about 1 g/l solution. Dissolve 0,1 g of sodium diethyldithiocarbamate (C2H5)2N.CSSNa.3H2O in 100 ml of water. Filter off any in-soluble matter present. Store the solution in a dark bottle. This solution can be kept unchanged for about 1 w
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BS-4897-2-1983 ISO-778-1982 BS 4897 1983 ISO 778 1982
链接地址:https://www.31doc.com/p-3771973.html