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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a surrogate in analytical chemistry?
💡 Hint: Think about what helps analyze the main compound.
Question 2
Easy
Why do we extract samples with hexane?
💡 Hint: Consider the solubility 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 primary purpose of using a surrogate in environmental analysis?
- To increase the volume
- To determine recovery efficiency
- To extract solids
💡 Hint: Reflect on the role of surrogates during analysis.
Question 2
True or False: The concentration process is necessary to improve the likelihood of detecting trace analytes.
- True
- False
💡 Hint: Think about detection limits.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have added a surrogate of 0.1 mg to 1 L of water. After extraction, you recover only 0.05 mg. Calculate the recovery percentage. What does this indicate about the extraction efficiency?
💡 Hint: Remember the recovery formula!
Question 2
If an instrument provides a response of 90,000 units correlating to 60,000 m and your calibration curve suggests a 2:3 ratio, calculate the unknown mass of the analyte in nanograms.
💡 Hint: Use the relationship between response and calibration ratio to solve.
Challenge and get performance evaluation