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2 cards from this section. Quick, good the night before a test.
What is mass concentration?
Think about the formula involving mass and volume.
Why is it important to know the detection limit?
Consider implications for very low levels of pollutants.
What is the formula for concentration?
Recall the basic definition discussed earlier.
Is the detection limit the lowest concentration that can be measured?
Think about why knowing the detection limit is significant.
A researcher measures suspended solids in a water sample and finds the concentration to be 2 mg/L. How much mass of suspended solids would be in a 10 L sample?
Use the concentration formula to calculate mass.
If an instrument has a detection limit of 0.01 mg, how would one adjust sample volume to reliably detect a substance expected at 0.005 mg/L?
Recall the relationship between sample volume and detection limit.
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