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Chapter_23_Part_I_Lecture_Notes - Chapter 23 Introduction...

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Chapter 23: Introduction to Analytical Separations Part I I. Goals: 1. To introduce students to the area of analytical separations and how analytical separations are used to solve real world problems. 2. To introduce students to the fundamentals of solvent-solvent extractions. 3. To introduce students to the concept of partitioning. 4. To introduce students to how to take advantage of pH effects in a separation. 5. Lastly, to introduce students to chromatography. II. Introduction to Analytical Separations A. Why are separations so important? B. What are the goals of a separation?
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C. Separations involve phase transfers. III. Solvent-Solvent (Liquid-Liquid) Extractions A. A typical solvent-solvent extraction experiment: A ≡ Analyte. The analyte is the molecule of interest or the molecule one is trying to analyze. Note: Harris uses S for solute. B. Partitioning and the partition coefficient, K. C. Fraction Left Behind / Fraction Extracted after a Solvent-Solvent Extraction 1. Let q = fraction left behind (not transferred out of original phase).
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