c0_intro - Chocolate bar 33 fat 47 sugar Dr Shubo Han 1...

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1 Dr. Shubo Han Chocolate bar: 33% fat, 47% sugar 1 Qualitative analysis : Process of determining the identity of the constituents of a substance. Quantitative analysis : Process of measuring how much of a constituent is present in a substance. Dr. Shubo Han Chocolate bar: 33% fat, 47% sugar Problem: What is the difference between qualitative and quantitative analysis? 2 Dr. Shubo Han Classical methods gravimetric titrimetric Instrumental methods spectroscopy electroanalytical chromatography How do you measure the caffeine content of a chocolate bar? 3
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2 Problem: Is this food safe to eat? Is air quality in NC clean? Dr. Shubo Han 4 Formulating the question Translate general questions into specific questions to be answered through chemical measurements. Chocolate bar question: how do you measure the caffeine content of a chocolate bar? Dr. Shubo Han Caffeine: analyte Analyte : Substance being analyzed 5 Selecting analytical procedures The chemical literature Search New design Dr. Shubo Han 6
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c0_intro - Chocolate bar 33 fat 47 sugar Dr Shubo Han 1...

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