ISO 6851:1987
Photography — Processing waste — Determination of total amino nitrogen — Microdiffusion Kjeldahl method
Reference number
ISO 6851:1987
ISO 6851:1987
Edición 1
1987-11
1987-11
© ISO 2024
Retirada
Resumen
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.
Ciclo de vida
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Ahora
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Revisada por
PublicadoISO 6851:2001
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