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? (Required.)

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

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3. What could cause all peaks to split across a chromatogram? (Required.)

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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)? (Required.)

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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)? (Required.)

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

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

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8. What is the main reason for regularly changing the septum? (Required.)

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9. Which of these is NOT usually a reason for peak fronting? (Required.)

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

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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) (Required.)

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

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13. Full Name (Required.)

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14. Email address (Required.)

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15. Company / Institution (Required.)

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16. Post Code (Required.)

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17. Telephone Number

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