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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a surrogate compound?
💡 Hint: Think about how it helps in analysis.
Question 2
Easy
Why do we use hexane in extraction?
💡 Hint: Consider the properties of hexane.
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 role of a surrogate in chemical analysis?
💡 Hint: Recall how surrogates aid in analytical efficiency.
Question 2
True or False: Calibration is not necessary for instrument response.
- True
- False
💡 Hint: Think about the calibration curve and its significance.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a sample with a known concentration of 200 ng/L. After extraction and calibration, you recover 50 ng/L as your surrogate. What is your recovery percentage, and what does this indicate?
💡 Hint: Use the recovery formula from the class.
Question 2
If 100 mL of solution yields 10 ng of analyte after analysis, calculate the concentration in ng/mL. If the instrument requires a minimum detection of 5 ng/mL, is this sample adequate?
💡 Hint: Remember to think about dilution requirements!
Challenge and get performance evaluation