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2 cards from this section. Quick, good the night before a test.
Define a surrogate in analytical chemistry.
What is it supposed to act like?
What is the formula for calculating the recovery rate?
Think about how you compare what you have now to what you started with.
What is the primary purpose of using surrogates in analysis?
Think about why we introduce something similar to the analyte.
True or False: A higher recovery rate always indicates a better extraction process.
What other factors might influence recovery?
You conduct an extraction of a solid sample with a known analyte concentration. If you start with 200 mg and recover 30 mg after extraction, calculate the recovery percentage.
Use the recovery formula to solve.
A calibration curve indicates that samples should yield a response of 5000 units for an analyte concentration of 25 mg/L. If a sample yields 10,000 units, what is the concentration of the analyte?
What kind of relationship does this suggest between response and concentration?
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