International Standard
ISO 6851:2001
Photography — Processing waste — Determination of total amino nitrogen (microdiffusion Kjeldahl method)
Reference number
ISO 6851:2001
Edition 2
2001-12
International Standard
Read sample
ISO 6851:2001
32493
Published (Edition 2, 2001)
This standard was last reviewed and confirmed in 2021. Therefore this version remains current.

ISO 6851:2001

ISO 6851:2001
32493
Language
Format
CHF 63
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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.

General information

  •  : Published
     : 2001-12
    : International Standard confirmed [90.93]
  •  : 2
     : 10
  • ISO/TC 42
  • RSS updates

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