Practice Dynamic Separation Control (2.4) - Analysis Methods – Gas Chromatography

Practice: Dynamic Separation Control

Lesson 2.4Analysis Methods – Gas Chromatography

Practise this section

9 questions

Flashcard drill
3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is the partition constant (K)?
Show hintHide hint
Think about how compounds interact with different phases.
Question 2.
What happens to retention time if the partition constant increases?
Show hintHide hint
Consider the concept of attraction between phases.
3Question 3.
What does a high partition constant (K) indicate?
- Shorter retention time
- Longer retention time
- No effect on retention time
Show hintHide hint
Think about which phase analytes prefer.
4Question 4.
True or False: Adjusting the temperature in chromatography can change the partition constant.
- True
- False
Show hintHide hint
Consider how heat affects compounds in solution.
Question 5.
You have a complex mixture of volatile and non-volatile compounds. Describe how you would set up a chromatography experiment to effectively analyze both types, including any steps you would take to dynamically control the process.
Show hintHide hint
Think about the characteristics that each type of compound has in relation to their phase preferences.
Question 6.
The results from your chromatography analysis show overlap in peak retention times for two different analytes. Discuss possible strategies to resolve this issue without reanalyzing the samples.
Show hintHide hint
Identify how changing each parameter can influence separation of analytes!

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