7.2. Challenges in Measurement

Try these first

1. 1.

   What is mass concentration?

   Hint

   Think about how we describe strength of solutions.

2. 2.

   What does detection limit refer to?

   Hint

   Consider how sensitive an instrument can measure.

3. 3.

   What is the role of sampling objectives in environmental monitoring?

   • Choose sampling locations
   • Decide on instruments
   • Define analysis methods

   Hint

   Remember the acronym SMART.

4. 4.

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

   • True
   • False

   Hint

   What is the critical threshold in measurements?

5. 5.

   A water sample yields a TSS reading of 0.3 mg/L, but the detection limit of your instrument is 0.5 mg/L. Discuss the implications of this discrepancy.

   Hint

   Think about what it means to measure below detection limits.

6. 6.

   You take repeated measurements of the same water sample and receive varied results due to fluctuations. Propose a methodology to enhance measurement reliability.

   Hint

   Think about what features make instruments suitable for consistent measurements.