For isothermal elution of a homologous series of compounds (those with similar
Chapter 23, Problem 23-D(choose chapter or problem)
For isothermal elution of a homologous series of compounds (those with similar structures, but differing by the number of CH2 Exercises groups in a chain), log t r is usually a linear function of the number of carbon atoms. A compound was known to be a member of the family (a) From the gas chromatographic retention times given here, prepare a graph of log t r versus n and estimate the value of n in the chemical formula. n 7 4.0 min CH4 1.1 min n 8 6.5 min unknown 42.5 min n 14 86.9 min (b) Calculate the retention factor for the unknown.
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