4.2. Goal of Sampling

Try these first

1. 1.

   What is the definition of concentration?

   Hint

   Think about how much of something is present in a given amount of space.

2. 2.

   Why is sample volume important?

   Hint

   Recall the relationship between volume and detection limits.

3. 3.

   What is the main goal of sampling?

   • A) To collect large volumes of samples
   • B) To measure concentrations of substances
   • C) To filter liquids

   Hint

   Think about what we are really trying to find out with sampling.

4. 4.

   True or False: Detection limits determine the maximum concentration that can be measured.

   • True
   • False

   Hint

   Focus on the definition of detection limits.

5. 5.

   You are tasked with measuring the concentration of pollutants in a river. Describe the steps you would take to ensure reliable data collection considering sample volume and detection limits.

   Hint

   Think critically about how to avoid being below the detection limit.

6. 6.

   You take a water sample and find the total suspended solids to be 0.3 mg/L, but your instrument has a detection limit of 1 mg/L. What does this tell you about the reliability of your measurement?

   Hint

   Reflect on the relationship between the expected concentration and instrument capabilities.