What type of HPLC column and detector could be used to separ

What type of HPLC column and detector could be used to separate and detect benzaldehyde and 4-hydroxymethylbenzaldehyde? What if the two analyses were phenol and 4-hydroxybenzyl alcohol?

Solution

The type of HPLC column and detector to separate above compounds is isocratic elution of a quaternary mixture of non-polar analytes, including benzyl alcohol, benzaldehyde. for phenol also, this HPLC is used.