ISO 6851:2001

Photography — Processing waste — Determination of total amino nitrogen (microdiffusion Kjeldahl method)

Publication date: 20 dhj 2001

General information

Current stage: 90.20 Effective date: 15 jan 2026

Originator: ISO

Owner: ISO/TC 42

Type: International Standard

ICS: 37.040.30 13.030.30

Gjuha: anglisht

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Statusi: Publikuar

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 6851:1987

NOW

PUBLISHED
ISO 6851:2001
90.20 Standard under periodical review
15 jan 2026

National adoptions

SSH ISO 6851:2000

DPS

Fotografi - Përpunimi mbeturinash - Përcaktimi total i azotit animik me metodën e mikrodifuzionit Kjeldal

60.60 Standard published

DPS/KT 230 më tepër

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