7.2.1. Detection Limits

Try these first

1. 1.

   Define sample volume.

   Hint

   Consider how much of a material you would need to analyse it.

2. 2.

   What does detection limit refer to?

   Hint

   Think about the smallest amount that an instrument can notice.

3. 3.

   What does a detection limit refer to?

   • The smallest quantity that can be measured
   • The largest quantity that can be measured
   • The average quantity measured

   Hint

   Think about what it means to detect something.

4. 4.

   True or False: A detection limit of zero means no analytes are present.

   • True
   • False

   Hint

   Consider how detection limits work.

5. 5.

   If a balance has a sensitivity of 0.01 mg and detects a solution of TSS at 0.005 mg/L, calculate what volume you will need to sample to ensure detection.

   Hint

   Identify the required volume that ensures measurement above the detection limit.

6. 6.

   A lab uses four different instruments with varying detection limits. Discuss how these differences could impact the results of a study measuring particulate matter in the air.

   Hint

   Consider how detection limits can affect the reliability of environmental data.