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4 cards from this section. Quick, good the night before a test.
What is an analyte?
Think about what we measure in environmental samples.
Name one method of extraction.
Consider methods used when preparing samples.
What is the purpose of sample extraction?
Remember that not all samples can be analyzed directly.
True or False: Solid-Phase Extraction is more messier than Liquid-Liquid Extraction.
Consider the steps involved in each method.
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?
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?
Focus on how recovery percentages affect the amounts.
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