1.1.1 - Overview of Analysis Methods
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Practice Questions
Test your understanding with targeted questions
What is an analyte?
💡 Hint: Think about what we measure in environmental samples.
Name one method of extraction.
💡 Hint: Consider methods used when preparing samples.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the purpose of sample extraction?
💡 Hint: Remember that not all samples can be analyzed directly.
True or False: Solid-Phase Extraction is more messier than Liquid-Liquid Extraction.
💡 Hint: Consider the steps involved in each method.
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Challenge Problems
Push your limits with advanced challenges
You have a 1 L water sample with an unknown concentration of analyte A. You perform a liquid-liquid extraction using 20 mL of solvent, recovering 5 mL of extract with a measured concentration of 10 mg/L in the extract. What was the concentration of A in the original sample?
💡 Hint: Think about how concentrations change with volume.
A certain extraction process shows a fractional recovery of 70%. If you added 20 µg of analyte A into the sample, how much analyte is recovered?
💡 Hint: Focus on how recovery percentages affect the amounts.
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