3.2. Microscopy for Shape and Morphology

Try these first

1. 1.

   What is particulate matter?

   Hint

   Think about what we breathe in every day.

2. 2.

   Name one technique used to measure PM.

   Hint

   Consider methods involving light.

3. 3.

   Which measurement technique uses lasers to size particles?

   • Optical
   • Gravimetric
   • Electrical mobility

   Hint

   Think of methods that involve vision.

4. 4.

   True or False: Aerodynamic diameter and optical diameter can sometimes be the same.

   • True
   • False

   Hint

   Consider their definitions.

5. 5.

   Given a sample of particulate matter with varying shapes, outline a method for determining its composition while addressing possible challenges in analysis.

   Hint

   Consider both instrumental analysis and sample preparation steps.

6. 6.

   In a study of air quality, researchers find discrepancies in PM measurements from different sensors. Discuss how standard particles could be employed to calibrate these instruments.

   Hint

   Think about how ensuring consistency can help resolve discrepancies.