7. Calculate the separation characteristics of a mixture of n-hexane and n-heptane on columns L=400 cm: a) with DS-550 silicone on sterhamol; b) with B-B’-dicyanodiethyl sulfide on chromosorb. The speed of the chart tape is 300 mm/h.
Peak parameters:
Hydrocarbon tR, s m0.5 mm
a b a b
n-Hexane 510 123 4.7 0.8
n-Heptane 1090 145 8.0 1.0
Determine which column provides better separation?
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