Ethanol and acetic acid were analyzed with a refractive
index detector. Separation was carried out using an Aminex
HPX-87H column (300 7.8 mm, Bio-Rad, Hercules, CA) at 60 C.
The mobile phase was 5 mM H2SO4 at a flow rate of 0.6 ml/min.
Sugars were analyzed with a refractive index detector using an
Aminex HPX-87P column (300 7.8 mm, Bio-Rad, Hercules, CA)
at 80 C.