By analogy to the reference method for the determination of
steryl ferulates suggested by Hakala et al. (2002), our method
allowed the extraction of high yields of campestanyl ferulate/
sitosteryl ferulate (74.8 mg/g DM), coming close to the established
method (76.2 mg/g DM). In contrast, applying the method of
Hakala et al. (2002), lutein and b-tocotrienol were undetectable,
since both compounds were presumably removed during the baseacid-
clean up step of the purification procedure.