Overview
SIST ISO 4220:1996 is an international standard established by the International Organization for Standardization (ISO) that specifies a titrimetric method with indicator or potentiometric end-point detection for determining a gaseous acid air pollution index in ambient air. This method is particularly applicable for measuring mass concentrations of sulfur dioxide (SO₂) higher than 30 µg/m³. The procedure evaluates the combined presence of acidic and alkaline gaseous pollutants in ambient air during a specified sampling and analysis period.
The standard guides environmental laboratories and air quality monitoring agencies in quantifying acidic air pollutants, allowing effective monitoring and control of air pollution that directly impacts human health and the environment.
Key Topics
Applications
SIST ISO 4220:1996 is highly valuable for:
Related Standards
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ISO 4219: Air Quality – Sampling of Sulfur Compounds
- Specifies equipment and procedures for collecting sulfurous compounds from ambient air, complementing ISO 4220's analytical methodology.
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ISO 10396: Ambient Air – Determination of Sulfur Dioxide (SO₂) – Ultraviolet Fluorescence Method
- An instrumental method offering continuous detection of SO₂, often used alongside titrimetric methods.
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ISO 10849: Ambient Air – Determination of Acidic Gases (NO₂ and SO₂)
- Focuses on detection of other acid gases relevant for comprehensive acid pollution profiling.
Keywords: ISO 4220, acid air pollution index, sulfur dioxide measurement, titrimetric method, potentiometric titration, ambient air quality, gaseous acid pollutants, air pollution monitoring, sulfur dioxide analysis, environmental standard, ISO air quality standards.
