BS ISO BRITISH STANDARD 7760:2001 Photography - Processing waste - Determination of hydroquinone ICS 13.030.30; 37.040.30 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS ISO 7760:2001 National foreword This British Standard reproduces verbatim IS0 7760:2001 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 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 or European 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 of itself confer immunity from legal obligations. This British Standard, having been prepared under the Summary of pages direction of the Consumer Products and Services Sector This document comprises a front cover, an inside front cover, the IsO title page, Policy and Strategy Committee, pages i to v, a blank page, pages 1 to 8, an inside back cover and a back cover. was published under the The BSI copyright date displayed in this document indicates when the authority of the Standards Policyand Strategy Committee documentwaslastissued. on 27 March 2002 Amendments issued sincepublication Amd. No. Date Comments BSI 27 March 2002 ISBN0580392260 ISO INTERNATIONAL STANDARD 7760 Second edition 2001-12-15 Photography Processing waste - Determination of hydroquinone Photographie-Effluents de traitements-Dosage de Ihydroquinone Reference number ISO 7760:2001(E) SO ISO 7760:2001(E) = ISO7760:2001(E) Contents Page Foreword. iv Introduction, 1 Scope. 2 Normative references.. 3 Principle... 4 Reactions 5 Safety and operationalprecautions 6 Materials and reagents.. 7 Apparatus. 5 8 Sampling and sample preparation. 6 Procedure 6 10 Expressionofresults 6 11 Test report. Bibliography ili ISO7760:2001(E) Foreword 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, governmental 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. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. InternationalStandardISO7760waspreparedbyTechnical CommitteeISO/TC42,Photography revision. iv ISO7760:2001(E) Introduction This International Standard is one of a series devoted to the analysis of photographic wastes; it encompasses the field of analysis of the hydroquinone content in a photographic effluent. Some of the procedures use caustic, toxic, or otherwise hazardous chemicals. Safe laboratory practice for the such as rubber gloves, face masks, or aprons. Normal precautions for the safe performance of any chemical procedure must be exercised at all times, but specific