The biomass was then homogenized using a cutting mill (Pulverisette 15, FRITSCH) and mineralized in nitric acid (Ultrapur, Merck Millipore) in a microwave (Berghof, Speedwave MWS-2) under high temperature and pressure.
Thebiomass was then homogenized using a cutting mill (Pulverisette15, FRITSCH) and mineralized in nitric acid (Ultrapur, MerckMillipore) in a microwave (Berghof, Speedwave MWS-2) underhigh temperature and pressure.