ISO-6851 › Historical Revision Information
Photography - Processing Waste - Determination of Total Amino Nitrogen - Microdiffusion Kj

ISO-6851 - 1ST EDITION - SUPERSEDED -- See the following: ANSI-PH4.47
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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.

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13.030.30 (Special wastes Including radioactive wastes, hospital wastes, carcasses, and other hazardous wastes)

37.040.30 (Photographic chemicals)

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Document Number

ISO 6851:1987

Revision Level

1ST EDITION

Status

Superseded

Publication Date

Dec. 1, 1987

Committee Number

ISO/TC 42