BS-7463-5-1991 ISO-9184-5-1990.pdf
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1、BRITISH STANDARD BS 7463-5: 1991 ISO 9184-5: 1990 Fibre furnish analysis of paper, board and pulps Part 5: Method of test by Lofton-Merritt stain (Wisbar modification) Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:40:29 GMT+00:00 2006, Uncontrolled Copy, (c
2、) BSI BS 7463-5:1991 This British Standard, having been prepared under the direction of the Paper and Printing Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 28 June 1991 BSI 08-1999 The following BSI references relate to the work on thi
3、s standard: Committee reference PAM/11 Draft for comment 88/45953 DC ISBN 0 580 19829 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Paper and Printing Standards Policy Committee (PAM/-) to Technical Committee PAM/11, upon which the f
4、ollowing bodies were represented: British Fibreboard Packaging Association British Paper and Board Industry Federation (PIF) British Printing Industries Federation British Telecommunications plc Envelope Makers and Manufacturing Stationers Association Her Majestys Stationery Office Man-made Fibres P
5、roducers Committee Ministry of Defence Pira (the Research Association for the Paper and Board, Printing and Packaging Industries) Post Office Society of British Printing Ink Manufacturers University of Manchester Institute of Science and Technology Amendments issued since publication Amd. No.DateCom
6、ments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:40:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7463-5:1991 BSI 08-1999i Contents Page Committees responsibleInside front cover National forewordii 1 Scope1 2 Normative reference1 3 Principle1 4 Reagen
7、ts1 5 Procedure1 6 Expression of results and test report1 Annex A (informative) Bibliography3 Table 1 Colour chart for Lofton-Merritt stain2 Publication(s) referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:40:29 GMT+00:00 2006, Unco
8、ntrolled Copy, (c) BSI BS 7463-5:1991 ii BSI 08-1999 National foreword This Part of BS 7463 has been prepared under the direction of the Paper and Printing Standards Policy Committee. It is identical with ISO 9184-5:1990 “Paper, board and pulps Fibre furnish analysis Part 5: Lofton-Merritt staining
9、test (modification of Wisbar)”, published by the International Organization for Standardization (ISO). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standa
10、rd does not of itself confer immunity from legal obligations. Cross-reference International StandardCorresponding British Standard ISO 9184-1:1990BS 7463 Fibre furnish analysis of paper, board and pulps Part 1:1991 General method (Identical) Summary of pages This document comprises a front cover, an
11、 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 incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University
12、, London South Bank University, Fri Dec 08 14:40:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7463-5:1991 BSI 08-19991 1 Scope This part of ISO 9184 specifies the preparation, use and colour reactions of Lofton-Merritt stain in fibre furnish analysis. It should be used in conjunction with ISO 91
13、84-1 and, if necessary, with other staining tests defined in ISO 9184-2. The Lofton-Merritt staining test is applicable to the qualitative and quantitative differentiation of the following pulps: unbleached and bleached softwood chemical pulps; unbleached kraft and sulfite in softwood pulps; unbleac
14、hed semi-chemical kraft and sulfite pulps. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this part of ISO 9184. At the time of publication, the edition indicated was valid. All standards are subject to revision, and p
15、arties to agreements based on this part of ISO 9184 are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 9184-1:1990, Paper, board and pulps Fibre f
16、urnish analysis Part 1: General method. 3 Principle Fibres are stained with Lofton-Merritt stain and examined under the microscope. 4 Reagents CAUTION Some of the components used in preparing this stain are toxic. The stain should be prepared and handled in keeping with safe laboratory practice. Use
17、 only reagents of recognized analytical grade and distilled water or water of equivalent purity. 4.1 Fuchsine, solution, about 1 % (m/m). Add 1 g of fuchsine monohydrochloride (C20H20N3Cl) (C.l. 42510 C.l. basic violet 14) in small portions to 50 ml of boiling water in a 250 ml beaker, with vigorous
18、 stirring. Dilute to 100 ml. 4.2 Malachite green, solution, about 2 % (m/m). Take 2 g of malachite green (C23H25N2Cl) (C.l. 42000 C.l. basic green 4) and proceed as described for the fuchsine solution. 4.3 Hydrochloric acid, solution, about 0,5 % (m/m). Dilute 5 ml of a 37 % (m/m) solution of hydroc
19、hloric acid (HCl) to 400 ml. Store in brown reagent bottles. The solutions (4.1 to 4.3) are stable. 4.4 Lofton-Merritt stain Mix 4,4 ml of the fuchsine solution (4.1); 2,2 ml of the malachite green solution (4.2); 20,0 ml of the hydrochloric acid solution (4.3). Pipette the required volume of each s
20、olution, given above, into a 100 ml glass cylinder and dilute to 100 ml. Store in a brown reagent bottle and keep in the dark when not in use. Shake before use. NOTE 1Adjustment of the stain mixture by the addition of malachite green or fuchsine solution is required to attain the colours given in Ta
21、ble 1. Test the fresh mixture with known samples containing unbleached softwood sulfate and sulfite pulp, and mechanical pulp. If the fibres of unbleached kraft pulp and/or mechanical pulp yield a reddish colour, add malachite green solution. If the fibres of unbleached sulfite pulp exhibit a bluish
22、 or greenish colour, add fuchsine solution. The stain mixture is stable. However, it is preferable to check it with known fibres every 2 months. More distinct staining is obtained with a fresh mixture. 5 Procedure 5.1 Staining Draw a specimen from the moist filtered fibre pad (see ISO 9184-1) into a
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