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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a surrogate in environmental analysis?
💡 Hint: Think about why we need a compound that mimics the target analyte.
Question 2
Easy
Define recovery efficiency.
💡 Hint: Consider what happens during the extraction process.
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 is the purpose of a surrogate in environmental analysis?
- To replace the analyte
- To estimate recovery
- To clean the sample
💡 Hint: Think about the role of surrogates in calculations.
Question 2
True or False: Calibration curves are only necessary for solid samples.
- True
- False
💡 Hint: Consider their broader role in analytical chemistry.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A water sample has 150 mg of an unknown contaminant, and you add 50 mg of surrogate. You recover 35 mg of the surrogate. What is the recovery percentage, and how can you use this to estimate the contaminant concentration?
💡 Hint: First, calculate the recovery, then apply it to the contaminant's mass.
Question 2
Consider two samples: one solid and one liquid, analyzed using the same method. Discuss potential differences in extraction efficiency and recovery rates.
💡 Hint: Think about how physical states influence analytical processes.
Challenge and get performance evaluation