DIN Standards Committee Water Practice
Water quality - Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes - Part 2: Chromotropic acid colour reaction (ISO 23697-2:2023); German and English version prEN ISO 23697-2:2025
Abstract
This document specifies a method for the determination of total bound nitrogen (ST-TNb) in water of various origins: groundwater, surface water and wastewater, in a measuring range of concentration generally between 0,5 mg/l and 150 mg/l of ST-TNb using the small-scale sealed tube method. Different measuring ranges of small-scale sealed tube methods can be required.
Begin
2025-05-23
WI
00230471
Planned document number
DIN EN ISO 23697-2
Project number
11905090
Responsible national committee
NA 119-09-02 AA - Organic compounds
Responsible european committee
Responsible international committee
ISO/TC 147/SC 2 - Physical, chemical and biochemical methods
draft standard
Water quality - Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes - Part 2: Chromotropic acid colour reaction (ISO 23697-2:2023); German and English version prEN ISO 23697-2:2025
2025-08
Order from DIN Media
