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Unformatted text preview: 0.72 b) Calculate the selectivity factor by the equation α = tR’(C)/tR’(B).
α = (14.1  3.1)/(13.3  3.1) = 1.08 18. a) Calculate the number of plates using the equation given in the answer to
problem 8 above.
Component N methylcyclohexane 16(10.0/0.76)2 = 2770 methylcyclohexene 16(10.9/0.82)2 = 2827 toluene 16(13.4/1.06)2 = 2557
ΣN = 8154 Average N = 8154/3 = 2718 = 2.7 x 103 plates...
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 Fall '08
 D.AMiller
 Chromatography, pH

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