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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the definition of matrix interference?
💡 Hint: Think about other substances affecting your readings.
Question 2
Easy
Name a solvent commonly used for extraction in environmental analysis.
💡 Hint: It separates well from water.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does matrix interference refer to?
- A. Help from other materials
- B. Effects from other substances
- C. The benefit of surrogates
💡 Hint: Think about what hinders our measurements.
Question 2
True or False: Surrogates have no role in assessing recovery rates.
- True
- False
💡 Hint: Recall the purpose of adding surrogates.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
In a liquid-liquid extraction, a scientist adds 0.1 mg of surrogate to 1 L of water and recovers 15% of it. Calculate how much surrogate was recovered.
💡 Hint: Use the percentage recovery to find the actual amount.
Question 2
A soil sample's extraction returns a concentration reading higher than expected based on initial values. What steps do you take to confirm the source of error?
💡 Hint: Think through factors that might alter results.
Challenge and get performance evaluation