character: Mr. David Kim
topic: Advanced Chromatographic Methods
grade: 11
subject: Chemistry
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character: Ms. Sarah Lee
topic: Introduction to Chromatography
grade: 11
subject: Chemistry
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character: Dr. Emily Chen
topic: Applications of Chromatographic Techniques
grade: 11
subject: Chemistry
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character: Mr. John Smith
topic: Separation Techniques in Chemistry
grade: 11
subject: Chemistry
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