Practice - Exam Format
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Practice Questions
Test your understanding with targeted questions
What is a surrogate compound?
💡 Hint: Think about how it helps in analysis.
Why do we use hexane in extraction?
💡 Hint: Consider the properties of hexane.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the role of a surrogate in chemical analysis?
💡 Hint: Recall how surrogates aid in analytical efficiency.
True or False: Calibration is not necessary for instrument response.
💡 Hint: Think about the calibration curve and its significance.
1 more question available
Challenge Problems
Push your limits with advanced challenges
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.
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!
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