ISO 6851:1987Withdrawn

Photography — Processing waste — Determination of total amino nitrogen — Microdiffusion Kjeldahl method

Photographie — Effluents de traitements — Détermination de l'azote amino total — Méthode de microdiffusion Kjeldahl

This edition has been replaced by ISO 6851:2001.

Abstract / scope

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.

Life cycle

Replaced by

ISO/DIS 6851Deleted (project abandoned)Photography — Processing wastes — Determination of total amino nitrogen by microdiffusion Kjeldahl methodInternational Standard · ISO/TC 42 ISO 6851:2001PublishedPhotography — Processing waste — Determination of total amino nitrogen (microdiffusion Kjeldahl method)International Standard · Published 20 Dec 2001 · ISO/TC 42