Practice Analytical Instrument Issues (2.4) - Analyte Losses in Chemical Analysis

Practice: Analytical Instrument Issues

Lesson 2.4Analyte Losses in Chemical Analysis

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9 questions

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2 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.
What is volatilization?
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Think about how liquids change in an open container.
Question 2.
Name one method to minimize adsorption.
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Consider the materials used for sample containers.
3Question 3.
What is one way to prevent volatilization of analytes?
- Use an open container
- Use an airtight container
- Allow samples to reach room temperature
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Think about the seal of the container.
4Question 4.
True or False: Adsorption can increase the analyte concentration in a sample.
- True
- False
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Remember what happens when analytes stick to container walls.
Question 5.
You are tasked to analyze water for pesticide residues. Discuss how you would prepare the samples to minimize volatilization and ensure accurate analysis.
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Consider every step from collection to analysis.
Question 6.
Imagine your analysis shows a significant discrepancy between expected and measured concentrations. What steps could you take to diagnose the reason behind potential sample gain?
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Think about where cross-contamination might occur.

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