Problem- A young researcher set out to develop a method for quantifying the polycyclic aromatic hydrocarbon (PAH) content in a contaminated soil sample by gas chromatography. During the initial stages of method development, the researcher was unable to separate anthracene and naphthalene with baseline resolution. From the options below, select all possible modifications the researcher could make to improve the resolution.
a) Decrease the temperature
b) Increase the stationary phase thickness
c) Use a column with a larger inner diameter
d) Choose a different stationary phase
e) Increase column length
Rework your solution from the beginning and check each step carefully