character: Dr. Emily Tran
topic: Gas Chromatography Techniques
grade: 11
subject: Chemistry
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character: Professor John Smith
topic: Analytical Chemistry Methods
grade: 11
subject: Chemistry
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character: Ms. Sarah Lee
topic: Separation Techniques in Chemistry
grade: 11
subject: Chemistry
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character: Dr. Alex Chen
topic: Applications of Chromatography in Industry
grade: 11
subject: Chemistry
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