You are now the chemist responsible for describing the efficiency of a newly produced GC column that is long. You do this by injecting an aliquot of an octadecane standard into the column and observing its resultant chromatographic output. What type of chromatography are you performing in this experiment? (2 marks) What would you assume the polarity of the mobile and stationary phases are in this efficiency experiment? Why? (3 marks) You find that the retention time for the standard is and the width at half-height is . The chromatographic peak shape is Guassian. Calculate the number of theoretical plates per length () of column in this column. (5 marks)
