The conference room was silent, the air purified, the lighting perfect.
It is purified by redistilling and condensing directly under paraffin.
Thus Demosthenes in his speech "On the crown" accused Aeschines of having "purified the initiated and wiped them clean with (not from) mud and pitch."
It is purified by boiling with acids, to remove any mineral matter, and is then ignited for a long time in a current of chlorine in order to remove the last traces of hydrogen.
Purified chicken embryo cell vaccine (PCEC)-A rabies vaccine in which the virus is grown in cultures of chicken embryo cells, inactivated, and purified for IM injection.