Ambient air – Method for the determination of the concentration of nitrogen dioxide by diffusive sampling -EN 16339:2025

EN 16339:2025 is a European standard that specifies a method for determining the concentration of nitrogen dioxide (NO2) in ambient air using diffusive sampling techniques. This standard is essential for environmental monitoring and air quality assessment, particularly in urban areas where nitrogen dioxide levels can significantly impact public health and the environment.

Scope of EN 16339:2025

The scope of EN 16339:2025 includes several key aspects:

1. Measurement Methodology: The standard outlines a specific methodology for sampling NO2 in ambient air using passive samplers. This involves the collection of air samples over a defined period, typically ranging from one to four weeks, depending on the design of the samplers and the expected concentration levels of NO2.
2. Concentration Range: EN 16339:2025 is applicable for measuring NO2 concentrations in the range of approximately 3 µg/m³ to 130 µg/m³. This range is critical for ensuring that the method is suitable for various environmental conditions and regulatory requirements.
3. Analytical Techniques: The standard specifies that the collected samples can be analyzed using colorimetry or ion chromatography (IC). These analytical techniques are widely accepted in environmental monitoring and provide reliable results for NO2 concentration.
4. Relevance to Air Quality Regulations: The standard is particularly relevant for compliance with air quality regulations set forth by the European Union, such as the Ambient Air Quality Directive (2008/50/EC). It provides a standardized method for assessing NO2 levels, which is crucial for maintaining air quality standards.
5. Safety and Handling: EN 16339:2025 includes guidelines for the safe handling of materials and equipment used in the sampling and analysis process. This is important for ensuring the safety of personnel involved in air quality monitoring.

Updates from Previous Versions

The 2025 version of EN 16339 introduces several significant updates compared to its predecessor, EN 16339:2013:

1. Refined Sampling Techniques: The new version enhances the sampling techniques for NO2, providing clearer guidelines and improved accuracy in measurement. This is crucial for ensuring that the results are reliable and consistent across different monitoring scenarios.
2. Alignment with Regulatory Changes: EN 16339:2025 has been updated to align with recent regulatory changes in the European Union regarding air quality standards. This ensures that the standard remains relevant in the context of evolving environmental regulations.
3. Improved Clarity and Usability: The updated standard aims to improve clarity and usability for laboratories and environmental agencies. This includes more detailed explanations of the sampling process and the significance of the results.
4. Focus on Environmental Impact: The 2025 version emphasizes the importance of monitoring nitrogen dioxide levels to minimize environmental impact and protect public health. This aligns with broader efforts in the EU to improve air quality and reduce pollution.
5. Enhanced Guidance for Compliance: The new version provides better guidance for compliance with both national and international air quality standards, facilitating easier adoption by environmental monitoring agencies across Europe.

Countries Utilizing EN 16339:2025

EN 16339:2025 is primarily utilized in European countries, as it is a European standard. However, its relevance extends beyond Europe due to the globalization of environmental monitoring practices. Some of the countries that are likely to adopt and utilize this standard include:

1. Germany: As one of the largest economies in Europe, Germany is likely to incorporate EN 16339:2025 into its national regulations, particularly in urban areas where air quality is a significant concern.
2. France: France has a strong focus on environmental regulations and air quality monitoring, making the adoption of EN 16339:2025 essential for ensuring compliance with national and EU standards.
3. United Kingdom: Although the UK has its own set of regulations post-Brexit, the principles outlined in EN 16339:2025 may influence future updates to these regulations, especially in relation to air quality monitoring.
4. Italy: Italy’s environmental agencies will benefit from the guidelines provided in EN 16339:2025 to ensure that nitrogen dioxide levels in urban areas are monitored effectively.
5. Scandinavian Countries: Countries like Sweden, Norway, and Denmark are known for their commitment to environmental protection and air quality. EN 16339:2025 will be relevant in these countries as they continue to develop their air quality monitoring standards.

In conclusion, EN 16339:2025 represents a significant advancement in the standardization of nitrogen dioxide measurement in ambient air. Its comprehensive scope, updated methodologies, and alignment with regulatory changes make it a crucial document for ensuring air quality monitoring across Europe. As environmental concerns continue to grow, the adoption of EN 16339:2025 will play a vital role in enhancing the reliability and effectiveness of air quality assessments, ultimately contributing to better public health and environmental protection.