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1,083 analytical interview questions shared by candidates

- What are some factors that can affect the peak in an HPLC chromatogram - (Given 5 different molecules) Which molecules would you expect to test for specific rotations - (Given 4 molecules) Which molecules would be unstable in regular conditions - (Given 6 molecules, you have to pick 1) What peaks in H-NMR would you expect to find for this molecule - (Given 3 molecules) Which of these molecules would you expect not to find a UV absorption spectra for - (Shown a mass spec peak) Identify what this peak represents
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Analytical Chemist Level 2

Interviewed at Toronto Research Chemicals

2.9★
Mar 27, 2024

- What are some factors that can affect the peak in an HPLC chromatogram - (Given 5 different molecules) Which molecules would you expect to test for specific rotations - (Given 4 molecules) Which molecules would be unstable in regular conditions - (Given 6 molecules, you have to pick 1) What peaks in H-NMR would you expect to find for this molecule - (Given 3 molecules) Which of these molecules would you expect not to find a UV absorption spectra for - (Shown a mass spec peak) Identify what this peak represents

What’s you biggest challenge you ever had? What’s your biggest achievement you had? What’s your weakness and strongest? Do you have experience with method development? Do you have experience with diluent not match with mobile phase? Which case you use direct injection or headspace? Do you have experience when there are three deadlines in the same day? How do you handle it? What’s you long term goal? Do you have any conflict with QA? What brings you to here? What parameter you did for method validation? What cause your baseline fluctuation? Which parameter you changed improves selectivity? Have you tried changing pore shell column? Have you tried water/ACN as mobile phase? How do you determine your peak purity, do you have PDA in your lab?
avatar

Senior Analytical Scientist I

Interviewed at Curia

3★
Aug 24, 2018

What’s you biggest challenge you ever had? What’s your biggest achievement you had? What’s your weakness and strongest? Do you have experience with method development? Do you have experience with diluent not match with mobile phase? Which case you use direct injection or headspace? Do you have experience when there are three deadlines in the same day? How do you handle it? What’s you long term goal? Do you have any conflict with QA? What brings you to here? What parameter you did for method validation? What cause your baseline fluctuation? Which parameter you changed improves selectivity? Have you tried changing pore shell column? Have you tried water/ACN as mobile phase? How do you determine your peak purity, do you have PDA in your lab?

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