Practice Quantitative And Qualitative Analysis (3) - Chromatography and Calibration

Practice: Quantitative and Qualitative Analysis

Lesson 3Chromatography and Calibration

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10 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
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is peak integration?
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Think about how we use areas in graphs.
Question 2.
Why do we use concentration for calibration?
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Consider the uncertainties of mass measurements.
3Question 3.
What does peak integration in chromatography signify?
- Area under the peak
- Height of the peak
- Retention time
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It's related to the amount of substance present.
4Question 4.
True or False: SIM mode is used for detecting all compounds in a sample.
- True
- False
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Think about what SCAN mode does compared to SIM.
Question 5.
If you have an unknown sample suspected to contain a mixture of volatile organic compounds, outline your analytical approach using both SCAN and SIM methods.
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Think stepwise; identification must precede quantification.
Question 6.
Discuss the balance between sensitivity and identification in analytical chemistry when using SCAN and SIM. What might be the consequences of prioritizing one over the other?
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Consider the trade-offs in focusing vs. broad scanning.

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