4.2.1. Concentration Measurement

Try these first

1. 1.

   Define concentration in your own words.

   Hint

   Think about it as mass divided by volume.

2. 2.

   What is the purpose of sampling?

   Hint

   Think of how it relates to environmental studies.

3. 3.

   What is the formula for calculating concentration?

   • Concentration = Volume/Mass
   • Concentration = Mass/Volume
   • Concentration = Volume + Mass

   Hint

   Think about how mass relates to volume.

4. 4.

   True or False: Detection limit refers to the maximum concentration that can be measured.

   • True
   • False

   Hint

   Consider what happens at very low concentrations.

5. 5.

   If you have a detection limit of 0.2 mg/L and you want to measure a concentration of 0.5 mg/L, what minimum sample volume do you need?

   Hint

   Consider how to relate concentration to sample volume.

6. 6.

   In an experiment, you measure TSS from three different locations in a lake and get measurements of 95, 96, and 94 mg/L. How do you characterize the precision and accuracy of your results?

   Hint

   Think about how you can determine consistency among varying measurements.