BS ISO BRITISH STANDARD 6853:2001 Photography Processing waste - Determination of ammoniacal nitrogen (microdiffusion method) ICS 13.030.20; 37.040.30 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS ISO 6853:2001 National foreword This British Standard reproduces verbatim IS0 6853:2001 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee CPW/42, Photography, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index", or by using the "Find" facility of the BSI Standards Electronic Catalogue. 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 Standard does not ofitself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the IsO title page, pages ii to v, a blank page, pages 1 to 8, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. This British Standard, having been prepared under the direction of the Consumer Products and Services Policy Amendments issued since publication and Strategy Committee, was published under the authority of the Standards Policy and Date Amd. No. Comments Strategy Committee on 18January 2002 CBSI 18 January 2002 ISBN0580375056 ISO INTERNATIONAL STANDARD 6853 Second edition 2001-12-15 Photography Processing waste - Determination of ammoniacal nitrogen (microdiffusion method) PhotographieEffluentsdetraitementDéterminationde Iazote ammoniacal (methodeparmicrodiffusion) Reference number ISO 6853:2001(E) ISO = ISO6853:2001(E) Contents Page Foreword. Introduction 1 Scope 2 Normativereferences 3 Principle... 4 Reaction. 5 Safetyand operational precautions. 6 Materials and reagents.. 7 Apparatus 8 Sampling and sample preparation... 6 Procedure 10 Expressionofresults 11 Test report Bibliography ili ISO6853:2001(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas 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 patent rights. IsO shall not be held responsible for identifying any or all such patent rights InternationalStandardISO6853waspreparedbyTechnicalCommitteeISO/TC42,Photography This second edition cancels and replaces the first edition (iSO 6853:1987), of which it constitutes a technical revision iv ISO6853:2001(E) Introduction This International Standard is one of a series devoted to the analysis of photographic wastes; it encompasses the This International Standard is intended for use by individuals with a working knowledge of analytical techniques. Some of the procedures use caustic, toxic or otherwise hazardous chemicals. Safe laboratory practice for the warnings are designated by a letter enclosed in angle brackets "<>." These are defined in clause 5 and then used throughout the text. More detailed information on hazards, handling and use