Thank you for participating in our Online Gas Chromatography Troubleshooting Course! To receive your completion certificate, test your knowledge with the quiz below. The passing score is 75% of the total available points.

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* 1. When you encounter a GC issue, what is the first thing you should do?

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* 2. If you are suddenly seeing no peaks, what are the likely causes of error (choose all that apply)?

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* 3. What could cause all peaks to split across a chromatogram?

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* 4. Why is it important to ensure that carrier and detector gases are extremely pure and completely dry (choose all that apply)?

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* 5. What is the name given to peaks which randomly appear in the chromatogram and don’t belong in the sample (select all that apply)?

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* 6. What could be done to minimise backflash in GC analysis (choose all that apply)?

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* 7. Why is it important to ensure that a liquid syringe is ‘zeroed’ before injection?

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* 8. What is the main reason for regularly changing the septum?

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* 9. Which of these is NOT usually a reason for peak fronting?

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* 10. What is the main reason for the silica wool within a glass insert/liner?

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* 11. If you don’t see a signal from a Flame Ionisation detector, what is the likely cause? (Choose all that apply)

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* 12. Why is it important to trim the column? (choose all that apply)

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* 13. Full Name

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* 14. Email address

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* 15. Company / Institution

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