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The chapter covers the methods for sampling and analyzing particulate matter (PM) in air, exploring different techniques and devices such as impactors and cyclones to effectively measure PM concentrations. It emphasizes the need for precise sampling protocols based on specific objectives, discusses the challenges of gravimetric measurement, and outlines the importance of time-averaged measurements for evaluating air quality standards. Various methodologies are examined to ensure accurate air quality monitoring for better environmental management.
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References
28a.pdfClass Notes
Memorization
What we have learnt
Final Test
Revision Tests
Term: Particulate Matter (PM)
Definition: Tiny particles suspended in the air, characterized by their aerodynamic diameter (e.g., PM10, PM2.5).
Term: Impactor
Definition: A device that separates PM based on inertial impaction, allowing smaller particles to pass through while larger particles are collected.
Term: Gravimetry
Definition: A method of measurement that involves weighing collected particles on a filter to determine PM concentration.
Term: Sampling Interval
Definition: The duration of time over which air samples are collected, affecting the accuracy of PM concentration readings.