BS ISO 6851:2002
Photography - Processing waste - Determination of total amino nitrogen (microdiffusion Kjeldahl method)

Standard No.

BS ISO 6851:2002

Release Date

2002

Published By

British Standards Institution (BSI)

Latest

BS ISO 6851:2002

Replace

97/704314 DC:1997

Scope

This International Standard specifies a method for the determination of the total organic nitrogen, as well as any ammoniacal nitrogen, present in photographic processing wastes by the Kjeldahl method. Total Kjeldahl nitrogen can be determined in photographic processing wastes in the range of 10 mg/l to 200 mg/l as ammonia, or in the range of 8 mg/l to 160 mg/l in terms of nitrogen. If ammoniacal nitrogen (see ISO 6853) is determined separately and subtracted, the concentration of organic amino nitrogen can be established.

BS ISO 6851:2002 history

• 2002 BS ISO 6851:2002 Photography - Processing waste - Determination of total amino nitrogen (microdiffusion Kjeldahl method)
• 2002 BS ISO 6851:2001 Photography. Processing waste. Determination of total amino nitrogen (microdiffusion Kjeldahl method)