Practice Solid Phase Extraction (spe) (1.1.7) - Environmental Analysis of Organics in Water

Practice: Solid Phase Extraction (SPE)

Lesson 1.1.7Environmental Analysis of Organics in Water

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9 questions

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6 sample questions

Question 1.
What does SPE stand for?
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Think about the process of isolating analytes.
Question 2.
Why do we use an adsorbent in SPE?
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It's important for the extraction process.
3Question 3.
What is the primary purpose of Solid Phase Extraction (SPE)?
- To directly measure analytes
- To concentrate analytes from a sample
- To dilute samples
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Think about what happens to the analyte during the process.
4Question 4.
True or False: SPE can only be used for liquid samples.
- True
- False
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Consider the flexibility of extraction techniques.
Question 5.
You have 5 liters of water containing an unknown analyte concentration. After performing SPE, you obtain a final volume of 10 mL and a measured concentration of 0.2 mg/mL in the extract. Calculate the concentration of the analyte in the original water.
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Think about how concentration relates to volume.
Question 6.
A liquid sample extraction results in a 75% recovery rate of an analyte. If the expected recovery was 40 micrograms, calculate how much of the analyte was actually recovered.
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Remember to multiply the expected recovery by the recovery percentage.

5 more questions in this section. Enroll free to practise them all.