Reference number
ISO 6851:1987
© ISO 2024
ISO 6851:1987
Photography — Processing waste — Determination of total amino nitrogen — Microdiffusion Kjeldahl method
Edition 1
1987-11
Withdrawn
Withdrawn (Edition 1, 1987)

Abstract

Describes a method for determining the total organic nitrogen and any ammoniacal nitrogen present in photographic processing waste. This amino nitrogen is converted to ammonia which is subsequently determined by absorption into boric acid in a microdiffusion cell along with any ammonia originally present.

General information

  • Status
     : Withdrawn
    Publication date
     : 1987-11
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 4
  • Technical Committee :
    ISO/TC 42
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