character: Dr. Emily Chen
topic: Chromatography Methods for Analyzing Drug Purity
grade: 11
subject: Chemistry
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character: Dr. Sarah Johnson
topic: Advanced Techniques in Chromatography
grade: 11
subject: Chemistry
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character: Prof. Robert Smith
topic: Understanding Drug Purity through Chemical Analysis
grade: 11
subject: Chemistry
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character: Dr. Lisa Wong
topic: Applications of Chromatography in Pharmaceutical Research
grade: 11
subject: Chemistry
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