ISO INTERNATIONAL STANDARD 6851 Second edition 2001-12-15 Photography Processing waste Determination of total amino nitrogen (microdiffusion Kjeldahl method) Photographie Effluents de traitement Determination de I'azote amino total (meéthode de microdiffusion Kjeldahl) Reference number ISO 6851:2001(E) ISO @ ISO 2001 ISO 6851:2001(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by isO member bodies. In the unlikely event @ISO2001 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.ch Printed in Switzerland @ ISO 2001 - All rights reserved ISO 6851:2001(E) Contents Page Foreword. .iv Introduction 1 Scope 2 Normative references. 3 Principle. 4 Reactions.. 5 Safety and operational precautions.. 6 Materials and reagents 1 Apparatus b 8 Sampling and sample preparation .. 6 9 Procedure 10 Expression of results 11 Test report. Bibliography. 0 ion?served ili