Objective To investigate the effect stabilizer of various formula on inactivation of porcine parvovirus(PPV)in human coagulation factor Ⅷ(FⅧ)by dry heat sterilization. Methods Bulks of FⅧ were subjected to ultrafiltraion and dialysis using buffers of formula A,B and C(sodium chloride concentration:C < A < B). The obtained final bulks were added with PPV as an indicator,at a titer of more than 6 LgTCID50 / ml,then lyophilized,inactivated by terminal dry heat treatment,and determined for residual PPV titer to...