Practice Quality Assurance In Analytical Techniques (8) - Introduction

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8 questions

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6 sample questions

Question 1.
What is a surrogate in analytical analysis?
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Think about what aids in validating the analyte's presence.
Question 2.
Why do we concentrate a sample before analysis?
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Higher concentration leads to better detectability.
3Question 3.
What does a surrogate do in analytical chemistry?
- Confirms the calibration
- Mimics the analyte behavior
- Improves extraction efficiency
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Remember its role in validation.
4Question 4.
True or False: Calibration is unnecessary if you know the analyte's exact concentration.
- True
- False
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Calibration's purpose is to ensure accuracy.
Question 5.
Given a sample, you added 200 nanograms of surrogate but recovered only 120 nanograms. What is the recovery efficiency?
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Use the formula for recovery efficiency.
Question 6.
You performed an extraction from a 2-liter sample but could only concentrate to 20 milliliters. How would you calculate the concentration factor?
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Remember how concentrations relate to volumes in your calculations.

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