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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is an analyte?
💡 Hint: Think about what we are trying to quantify.
Question 2
Easy
Why do we need to extract analytes from water?
💡 Hint: Consider the challenges of direct measurement.
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 extracting analytes from a sample?
- To increase concentration
- To decrease contamination
- To make measurement easier
💡 Hint: Think about the feasibility of direct measurement.
Question 2
True or False: Surrogate standards are used to introduce errors in recovery tests.
- True
- False
💡 Hint: Consider the definition and the role of surrogates.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a sample of water containing an analyte with a concentration of 0.2 mg/L. The minimum detection limit for your instrument is 0.5 mg/L. What steps could you take to measure this analyte accurately?
💡 Hint: Think about the methods of increasing concentration.
Question 2
If a sample extraction results in recovering 80% of an analyte, and you initially added 10 mg to the sample, what is the amount of the analyte you recovered post-extraction?
💡 Hint: Calculate the percentage of the initial added amount.
Challenge and get performance evaluation