ISO 6851:2001
ISO 6851:2001 Photography – Processing waste – Determination of total amino nitrogen (microdiffusion Kjeldahl method)
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Description
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.
Edition
2
Published Date
2001-12-20
Status
PUBLISHED
Pages
10
Language
English
Format
Secure PDF
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Abstract
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.
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