ISO 6851:2001
Photography - Processing waste - Determination of total amino nitrogen (microdiffusion Kjeldahl method)
- Standard No.
- ISO 6851:2001
- Release Date
- 2001
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 6851:2001
- 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.
ISO 6851:2001 history
- 2001 ISO 6851:2001 Photography - Processing waste - Determination of total amino nitrogen (microdiffusion Kjeldahl method)
- 1987 ISO 6851:1987 Photography; Processing waste; Determination of total amino nitrogen; Microdiffusion Kjeldahl method
