BS ISO BRITISH STANDARD 6849:1996 Implementation of ISO 6849:1996 Photography - Processing wastes - Determination of boron ICS 37.040.30 BSi NOCOPYINGWITHOUTBSIPERMISSIONEXCEP BS ISO 6849:1996 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee CPW/42, Photography, upon which the following bodies were represented: British Photographic Association British Institute of Non-destructive Testing Chemical Industries Association Department of the Environment Ministry of Defence PICON Royal Photographic Society This British Standard, having been prepared under the direction ofthe Consumer Products and Services Sector Board, was published under the authority of the Standards Board and comes Amendments issued since publication into effect on 15March1997 Date Amd. No. Comments CBSI 12-1998 The following BSI references relate to the work on this standard: Committee reference CPW/42 Draft for comment 90/44773 DC ISBN0580266346 BS ISO 6849:1996 Contents Page Committees responsible Inside front cover National foreword ii Foreword ii 1 Scope 1 2 Normative references 1 3 1 Principle 4 Safety and operational precautions 2 4.1 Hazard warnings 2 4.2 Hazard information code system 2 4.3 Safety precautions 2 Materials and reagents 2 5 5.1 General 2 2 5.1.1 Handling and labelling 5.1.2 Purity 2 5.1.3 Water 2 5.1.4 Strength of solutions 2 5.2 Reagents for method using boric acid-mannitol complex 3 5.3 Reagents for methylene blue method 8 6 Apparatus 4 6.1 Special apparatus for method using boric acid-mannitol 4 6.2 Special apparatus for methylene blue method 4 7 Sampling and sample preparation 4 8 Procedure4 8.1 Procedure for method using boric acid-mannitol complex for levels of boron from 0,1 mg/l to 5 mg/l 4 8.1.1 Removal of phosphate 4 8.1.2 Removal of carbonate 4 8.1.3 Preparation for titration 4 Titration 8.1.4 4 8.1.5 Obtaining a blank reading 5 8.2 Procedure for method using boric acid-mannitol complex for high levels of boron from (5 mg/l to 100 mg/l 5 8.2.1 Removal of carbonate 8.2.2 Preparation for titration 5 Titration 8.2.3 5 8.2.4 Obtaining a blank reading 5 8.2.5 Expression of results; method using boric acid-mannitol complex 5 8.2.6 Precision 5 8.3 Procedure for methylene blue method 5 8.3.1 Direct sample preparation 5 8.3.2 Fusion sample preparation 6 8.3.3 6 Completion of sample preparation 8.3.4 Calibration curve 6 8.3.5 Expression of results 6 Test report 6 6 Inside back cover Annex (informative) Bibliography @BSI12-1998 1