 Identification is often by high performance liquid chromatography with a UV detector or by LC-MS. Alternatively they can be derivatised to make them volatile and therefore suitable for GC-MS. Curcumin can be hydrolyzed (alkaline) to yield two molecules of ferulic acid.Peroxidases can produce dimers of ferulic acid, in the presence of hydrogen peroxide through radical polymerization.Diferulic acids are more effective inhibitors of lipid peroxidation and better scavengers of free radicals than ferulic acid on a molar basis.