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4 cards from this section. Quick, good the night before a test.
What is an analyte?
Think about what we are trying to quantify.
Why do we need to extract analytes from water?
Consider the challenges of direct measurement.
What is the purpose of extracting analytes from a sample?
Think about the feasibility of direct measurement.
True or False: Surrogate standards are used to introduce errors in recovery tests.
Consider the definition and the role of surrogates.
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?
Think about the methods of increasing concentration.
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?
Calculate the percentage of the initial added amount.
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