2.1. Reagents
The formaline waste is composed of 37% formaldehyde and
10% methanol. Hydrogen peroxide solution (35%, w/w) and
heptahydrated ferrous sulfate (FeSO4·7H2O) were all analytical
grade and purchased from Merck. Catalase was obtained from
bovine liver (Fluka Biochemika). All reagents employed were
not subjected to any further treatment. Water used throughout
was prepared with Millipore Milli-Q water.