GB/T 41965-2022Photography - Processing waste - Determination of total amino nitrogen(microdiffusion Kjeldahl method) (English PDF)

1 Scope

This document describes a method for the determination of total organic nitrogen and any ammoniacal nitrogen in photographic processing effluents by the Kjeldahl method.

This method can determine the total Kjeldahl nitrogen in the waste liquid of photography processing, the concentration range is 10mg/L~200mg/L in ammonia, or the concentration in nitrogen

The concentration range is 8mg/L~160mg/L. If the ammoniacal nitrogen is determined separately and subtracted (see ISO 6853), the organic amino nitrogen content can be determined.

concentration.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

flasks)

Note. GB/T 12806-2011 Laboratory Glass Instruments Single Marked Line Volumetric Flasks (ISO 1042.1998, NEQ)

ISO 5667-1 Water quality sampling Part 1.Guidelines for the design of sampling schemes (Waterquality-Sampling-Part 1.

Note. GB/T 12997-1991 Water Quality Sampling Scheme Design Technical Regulations (ISO 5667-1.1980, IDT)

ISO 5667-2 Water quality sampling Part 2.Guidance on sampling techniques (Waterquality-Sampling-Part 2.Guidance

Note. GB/T 12998-1991 Water Quality Sampling Technical Guidance (ISO 5667-2.1982, NEQ)

ISO 5667-3 Water quality sampling Part 3.Sample storage and handling guidelines (Waterquality-Sampling-Part 3.

Note. GB/T 12999-1991 Technical regulations for storage and management of water quality sampling samples (ISO 5667-3.1985, NEQ)

General test methods)

Note. For Chinese documents that have a consistent correspondence with ISO 6353-1, see Appendix NA.

Specifications-Firstseries)

Note. For Chinese documents that have a consistent correspondence with ISO 6353-2, see Appendix NA.

Specifications-Secondseries)

Note. For Chinese documents that have a consistent correspondence with ISO 6353-3, see Appendix NA.

ISO 10349-1 Methods of testing photographic grade chemicals Part 1.General (Photography-Photographic-

Note. GB/T 20432.1-2006 Test Methods for Photographic Grade Chemicals Part 1.General Rules (ISO 10349-1.2002, IDT)

GB/T 40260 | GB 38508 | HG/T 3009 | GB/T 46432 | GB/T 41964 | […]