The supernatant collected was assayed for ferrocyanide content using 4, 7-diphenyl-1, 10-phenanthroline disulfonic acid
disodium salt, absorption was recorded at 535 nm ([member of] = 20,500 [M.
savings arising out of in-house Diamino Stilbene Disulfonic Acid
(DASDA) manufacturing unit and the likely benefits from the proposed captive power plant.
By adding an optical brightener called stilbene disulfonic acid
to Gypchek, they have reduced the dose needed by 40 percent, Webb says.