BS EN ISO 11166:2014 is a professional technical standard that specifies the requirements for the determination of sulfur dioxide (SO2) in ambient air using ultraviolet fluorescence. This standard provides guidance on sampling and measurement methods, as well as the necessary quality control procedures to ensure accurate and reliable results.
Sampling and Measurement Methods
To determine the level of SO2 in ambient air, BS EN ISO 11166:2014 recommends the use of an automated method based on ultraviolet fluorescence. This method involves passing the sample air through a filter that traps sulfur compounds. The trapped SO2 is then released by adding hydrogen peroxide or sodium carbonate solution, and the resulting gas stream is directed into a detection chamber where it is exposed to ultraviolet light. The emitted fluorescence is detected and measured to determine the concentration of SO2 present in the ambient air sample.
Quality Control Procedures
BS EN ISO 11166:2014 emphasizes the importance of implementing rigorous quality control procedures to ensure the accuracy and reliability of the measurements obtained. These procedures include regular calibration of the analytical instrument, verification of its performance using reference materials with known SO2 concentrations, and participation in interlaboratory comparison programs to assess the proficiency of the testing facility.
In addition, the standard outlines criteria for assessing the uncertainty associated with the measurement results, taking into account various sources of error such as variations in sampling, instrument drift, and environmental conditions. By following these quality control practices, laboratories can ensure that their measurements comply with the requirements of BS EN ISO 11166:2014.
Benefits and Applications
BS EN ISO 11166:2014 provides a standardized approach for the measurement of SO2 in ambient air. Accurate and reliable measurements of SO2 are crucial for assessing air quality, determining compliance with regulatory limits, and evaluating the effectiveness of pollution control measures. By using this standard, environmental agencies, research institutions, and industry can obtain consistent and comparable data, facilitating better decision-making and policy formulation to protect public health and the environment.
In conclusion, BS EN ISO 11166:2014 is a professional technical standard that outlines the requirements for measuring sulfur dioxide in ambient air using ultraviolet fluorescence. By adhering to the sampling and measurement methods, as well as implementing the prescribed quality control procedures, accurate and reliable results can be obtained. This standard plays a crucial role in ensuring consistent and comparable measurements, which are vital for assessing air quality and safeguarding the environment.
Nina She