ISO INTERNATIONAL STANDARD 9184-3 First edition 1990-12-15 Paper, board and pulps -- Fibre furnish analysis - Part 3: Herzberg staining test Papier, carton et pates -- Determination de la composition fibreuse - Partie 3: Coloration de Herzberg Reference number ISO 9184-3:1990(E) No reproduction or networking permitted without license from IHS Not for Resale ISO 9184-3:1990(E) Foreword IsO (the International Organization for Standardization) is a woridwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with iso, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft international Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Inter- national Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IsO 9184-3 was prepared by Technical Committee iso/Tc6,Paper,boardandpulps. Iso 9184 consists of the following parts, under the general title Paper, board and pulps -- Fibre furnish analysis: Part 1: General method Part 2: Staining guide -- Part 3: Herzberg staining test --- Part 4: Graff "C" staining test -- Part 5: Lofton-Merritt staining test (modification of Wisbar) --- Part 6: Weight factors by fibre coarseness method -- Part 7: Weight factors by comparison method Part 1 gives general instructions for the performance of fibre furnish analysis. It should be used in conjunction with the staining guide (see part 2) and the staining tests (see parts 3 to 5). Additional parts of this International Standard will be published if re- quired by the development of new kinds of fibres or new staining tests. Annex A of this part of isO 9184 is for information only. CISO1990 or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 : CH-1211 Geneve 20 : Switzerland Printed in Switzerland ii NotforResale ISO 9184-3:1990(E) INTERNATIONAL STANDARD Paper, board and pulps -- Fibre furnish analysis Part 3: Herzberg staining test Scope 4 Reagents This part of isO 9184 specifies the preparation, use CAUTION - Some of the components used in pre- paring this stain are toxic. The stain should be pre- and colour reactions of Herzberg stain in fibre fur- nish analysis. It shouid be used in conjunction with pared and handled in keeping with safe laboratory Iso 9184-1 and, if necessary, with other staining practice. tests defined in Is0 9184-2. Use only reagents of recognized analytical grade The Herzberg staining test is applicable to the and distilled water or water of equivalent purity. qualitative and quantitative differentiation between chemical, mechanical and rag pulps. The stain also 4.1 Zinc chloride solution, saturated at room tem- permits the qualitative identification semi- of perature. chemical pulp as well as the differentiation between Add zinc chloride (ZnCl2) to about 100 ml of warm regenerated cellulose fibres (viscose, etc.) and syn- water until an undissolved residue remains. Allow thetic fibres. to cool to room temperature and check that some zinc chloride crystallizes. Store in a brown reagent bottle. The solution is stable. Normative reference 2 4.2 lodine solution. The following standard contains provisions which, Mix 2,1 g of potassium iodide (Kl) and 0,1 g of iodine through reference in this text, constitute provisions (l2). Add 5 ml of water dropwise to the mixture by of this part of isO 9184. At the time of publication, mean of a pipette,