Preservatives for foods were analyzed using RSpak DE-613 (a column for reversed phase chromatography).
Sample : p-Hydroxybenzoate
Me Methyl paraben, Methyl p-hydroxybenzoate
Et Ethyl paraben, Ethyl p-hydroxybenzoate
n-Pr Propyl paraben, Propyl p-hydroxybenzoate
n-Bu Butyl paraben, Butyl p-hydroxybenzoate
Column : Shodex RSpak DE-613 (6.0mmID*150mm)
Eluent : CH3CN/H2O=50/50
Flow rate : 2.0mL/min
Detector : UV(254nm)
Column temp. : 50°C
