1.3. Sampling Methods

Try these first

1. 1.

   What is grab sampling?

   Hint

   Consider scenarios where you would want a quick measurement.

2. 2.

   Name one disadvantage of grab sampling.

   Hint

   Think about where grab sampling is effective.

3. 3.

   What is the main purpose of a filter in vapor sampling?

   • To collect particulate matter
   • To separate vapors from particles
   • To enhance vapor concentration

   Hint

   Think about the components we want to measure.

4. 4.

   Is grab sampling effective for low concentrations?

   • True
   • False

   Hint

   Consider the scenarios where grab sampling is applied.

5. 5.

   A researcher needs to monitor air quality near a highway. Explain how they could use both grab and absorbent sampling at different locations along the highway.

   Hint

   Consider the concentration levels changing with distance.

6. 6.

   Discuss a scenario where a loss of volatile compounds during the absorbent sampling process could significantly affect results. What precautions would you suggest?

   Hint

   Think about the properties of the compounds being sampled.