GB/T 41964-2022Photography - Processing waste - Determination of ammoniacal nitrogen(microdiffusion method) (English PDF)

1 Scope

This document describes a method for the determination of ammonia and other volatile amines liberated from photographic processing effluents using strong bases, with results expressed in terms of nitrogen express.

This method is applicable to the determination of ammonia mass concentration range of 10mg/L~200mg/L or nitrogen mass concentration range of 8mg/L~

Ammonia concentration in typical photographic processing effluent of 160 mg/L. Other volatile amines are also commonly defaulted to ammonia, but the presence of ammonia in photographic processing waste

Concentrations are usually very low.

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.

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)

3 Terms and Definitions

This document does not have terms and definitions that need to be defined. […]