Practice Calculating Recovery (3.2) - Introduction - part B - Environmental Quality Monitoring & Analysis, - Vol 2

Practice: Calculating Recovery

Lesson 3.2Introduction - part B

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define 'surrogate' in the context of environmental analysis.
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Consider its role in recovery calculations.
Question 2.
What is meant by extraction in analytical chemistry?
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Think about the methods we discussed.
3Question 3.
What is the primary purpose of using a surrogate in analytical chemistry?
- A) To increase sample volume
- B) To act as an internal standard
- C) To mimic the analyte's behavior
- D) To decrease extraction time
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Think about what surrogate means in context.
4Question 4.
True or False: The recovery rate is always expected to be above 100%.
- True
- False
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Consider how analytical processes might lead to material loss.
Question 5.
A sample contains 150 micrograms of compound X. After extraction and analysis, it reveals a recovery of 90 micrograms. What is the recovery rate?
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Use the same formula we discussed for percentage calculation.
Question 6.
If you added 50 mg/L of an analyte to a sample and recovered only 2 mg/L after analysis, calculate the efficiency of extraction as a percentage.
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Think about how to represent it as a percentage of the initial concentration.

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