Reference number
ISO 6849:1996
ISO 6849:1996
© ISO 2025
International Standard
ISO 6849:1996
Photography — Processing wastes — Determination of boron
Edition 1
1996-11
1996-11
ISO 6849:1996
13358
Publiée
(Edition 1, 1996)
Cette publication a été révisée et confirmée pour la dernière fois en 2021.
Cette édition reste donc d’actualité.
Résumé
Gives two methods for the determination of boron in photographic processing wastes. The first method is the estimation of borates by titration of the boric acid-mannitol complex. Suitable for boron concentrations of 0,1 mg/l and higher. The second alternative method is a spectrophotometric technique using methylene blue which can be used in the concentration range of 0,1 mg/l to 1,0 mg/l.