Novel Production Method for Plant Polyphenol from Livestock Excrement Using Subcritical Water Reaction
Figure 2
The mass spectra of the HPLC peaks of the cattle excrement treated at C.
Mass scan was performed in negative ion detection mode after
electrospray ionization. Theoretical ratios of mass to charge (m/z) of deprotonated ions ([M-H]-)
of protocatechuic
acid, vanillic acid, syringic acid and vanillin are 153.02, 167.03, 197.04, and
151.04, respectively.
