GB/T 41964-2022 (English Version) PDF

Standard No.: GB/T 41964-2022
Language: Chinese, Available in English version
Release Date: 2022
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 41964-2022

Scope: This document describes a method for the determination of ammonia and other volatile amines released from photographic processing effluents using strong bases, the results expressed in nitrogen. This method is applicable to the determination of the ammonia concentration in typical photographic processing waste liquid with the mass concentration range of ammonia gas ranging from 10 mg/L to 200 mg/L or the range of nitrogen mass concentration ranging from 8 mg/L to 160 mg/L. Other volatile amines are also commonly defaulted to ammonia, but are usually present in very low concentrations in photographic processing effluent.

GB/T 41964-2022 Referenced Document

ISO 10349-1 Photography - Photographic-grade chemicals; Test methods - Part 1: General
ISO 5667-1 Water quality — Sampling — Part 1: Guidance on the design of sampling programmes and sampling techniques*， 2023-03-14 Update
ISO 5667-2 Water quality; sampling; part 2: guidance on sampling techniques
ISO 5667-3 Water quality*， 2024-02-01 Update
ISO 6353-1 Reagents for chemical analysis; Part 1 : General test methods
ISO 6353-2 Reagents for chemical analysis — Part 2: Specifications — First series — Addendum 2
ISO 6353-3 Reagents for chemical analysis; Part 3 : Specifications; Second series
ISO 648 Laboratory glassware - Single-volume pipettes

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