Chemistry of Separation. Outline. Introduction Types Extraction Phase changes Electric Fields Flotation Membranes Other Chromatographic. Sampling. Instrumentation. Processing. Sample. Calibration. Measurement. Interpretation. Pretreatment. Extraction. Separation. Clean up.
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Instrumentation
Processing
Sample
Calibration
Measurement
Interpretation
Pretreatment
Extraction
Separation
Clean up
Concentration
Derivatization
Analytical ProcessFood
Toluene + Benzene
From: Meloan, 1999. Chemical Separations: Principles, Techniques, and Experiments, John Wiley & Sons, Inc., New York.
Solvent
Fs
F

+
+
Fs=6prhu
r, radius of the particle (cm), h, viscosity of the medium (poises), u, electrophoretic velocity (cm/sec)
F=QE
Q, charge on the particle
E, field strength
Fs
F

+
+
Fs=6prhu
r, radius of the particle (cm), h, viscosity of the medium (poises), u, electrophoretic velocity (cm/sec)
F=QE
Q, charge on the particle
E, field strength
Thus, Fs=QE=6prhu and
U=Q/6prh
R = V / I
R, resistance, V, voltage, I, current
W = I2 R
W, watts,R, resistance, I, current
http://www.mnstate.edu/marasing/CHEM480/Handouts/Chapters/Capillary%20Electrophoresis.pdf
1. Use proper grade filter; 2. Decant; 3. Use long stem funnel; 4. Use narrow diameter stem rather than long one; 5. Use fluted funnel if possible; 6. Fold paper with 1/8 to 1/4th inch offset; 7. Tear paper at top of fold to prevent air intake; 8. Keep stem full of solution; 9. Touch end of stem to side of beaker