Chemistry 155 Introduction to Instrumental Analytical Chemistry

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Chem 155 Unit 1 Page 6 of 31316 Mass Spectrometry (MS) overview: ............................................................. 27616.1 Example: of a GCMS instrument: ................................................... 27616.2 Block diagram of MS instrument. ................................................... 27716.3 Information from ion mass .............................................................. 27816.4 Ionization Sources .......................................................................... 27916.5 Mass Analyzers: ............................................................................. 28416.6 Mass Spec Questions: ................................................................... 28917 Chromatography .......................................................................................... 29117.1 General Elution Problem / Gradient Elution .................................... 30417.2 T-gradient example in GC of a complex mixture. ........................... 30617.3 High Performance Liquid Chromatography .................................... 30717.4 Types of Liquid Chromatography ................................................... 30817.5 Normal Phase: ............................................................................... 30817.6 HPLC System overview: ................................................................. 31117.7 Example of Reverse-phase HPLC stationary phase: ..................... 31217.8 Ideal qualities of HPLC stationary phase: ....................................... 313Page 6 of 313
Chem 155 Unit 1 Page 7 of 3131 Overview and ReviewSkoog Ch 1A,B,C (Lightly) 1D, 1E EmphasizedAnalytical Chemistry is Measurement Science.Simplistically, the Analytical Chemist answers thefollowing questions:What chemicals are present in a sample?QUALITATIVE ANALYSISAt what concentrations are they present?QUANTITATIVE ANALYSISAdditionally, Analytical Chemists are asked:• Where are the chemicals in the sample?• liver, kidney, brain• surface, bulk• What chemical forms are present?• Are metals complexed?• Are acids protonated?• Are polymers randomly coiled or crystalline?• Are aggregates present or are molecules insolution dissociate?• At what temperature does this chemicaldecompose?• Myriad questions about chemical states…Page 7 of 313
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Chemistry 155 Introduction to Instrumental Analytical Chemistry

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