BS EN ISO 23697-2:2025: Water Quality Standard

Introducing the BS EN ISO 23697-2:2025, a comprehensive standard dedicated to the determination of total bound nitrogen (ST-TNb) in water. This standard employs the innovative method of using small-scale sealed tubes and the chromotropic acid colour reaction, ensuring precise and reliable results in water quality analysis.

Key Features

• Standard Number: BS EN ISO 23697-2:2025
• Pages: 18
• Release Date: December 22, 2025
• ISBN: 978 0 539 37111 6
• Status: Standard

Overview

This standard is an essential tool for professionals in the field of water quality management. It provides a detailed methodology for the determination of total bound nitrogen, a critical parameter in assessing water quality. The use of small-scale sealed tubes in conjunction with the chromotropic acid colour reaction offers a streamlined and efficient approach to water testing.

Why Choose BS EN ISO 23697-2:2025?

The BS EN ISO 23697-2:2025 standard is designed to meet the needs of laboratories and water quality professionals who require accurate and consistent results. Here are some reasons why this standard is a valuable addition to your water testing protocols:

• Precision: The method outlined in this standard ensures high precision in the measurement of total bound nitrogen, providing reliable data for water quality assessment.
• Efficiency: The use of small-scale sealed tubes simplifies the testing process, reducing the time and resources required for analysis.
• Comprehensive Guidance: With 18 pages of detailed instructions and guidelines, this standard offers comprehensive support for implementing the testing method effectively.
• Up-to-Date: Released in December 2025, this standard reflects the latest advancements and best practices in water quality testing.

Applications

The BS EN ISO 23697-2:2025 standard is applicable in various settings, including:

• Environmental Monitoring: Essential for monitoring water bodies to ensure compliance with environmental regulations and standards.
• Industrial Water Testing: Useful for industries that require regular monitoring of water quality to maintain operational standards and environmental compliance.
• Research and Development: A valuable resource for researchers studying water quality and developing new methods for water analysis.

Conclusion

The BS EN ISO 23697-2:2025 standard is a vital resource for anyone involved in water quality testing. Its precise methodology, efficiency, and comprehensive guidance make it an indispensable tool for ensuring accurate and reliable water quality assessments. Whether you are in environmental monitoring, industrial water testing, or research, this standard provides the framework you need to achieve excellence in water quality analysis.

Stay ahead in the field of water quality management with the BS EN ISO 23697-2:2025 standard, and ensure that your water testing protocols are aligned with the latest industry standards and practices.

BS EN ISO 23697-2:2025

This standard BS EN ISO 23697-2:2025 Water quality — Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes is classified in these ICS categories:

• 13.060.50 Examination of water for chemical substances

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.