Sample was digested in polytetrafluorethylene sealed vesssle by nitric acid-perhydrol or high chloric acid-perhydrol, Hg As Pb were simultaneously determinated by ICP-AES.
The starting temperature of crystallization for the peroxidation zirconic acid precursor during the heating process is higher that that of zirconium hydroxide.
The catalysts,which were used for oxidating hydrogenized anthraquinone working fluid in the production course of hydrogen peroxide by anthraquinone method were introduced.
Research and development for fhe production of pyrocatechol and hydroquinone by reaction of phenol with hydrogen peroxide and percarboxylic acid as hydroxylating reagent are introduced.
In this paper, the protection measures of carbohydrate during pulp TCF bleaching, such as oxygen, ozone, peroxide, peracid and photochemistry reaction of bleaching, were respectively.
Has old Z met a ghost?Old z has designed that perhydrol constitutes fuel , that has been a pretty difficult thing in wanting to let perhydrol dissolve to fringe benefit.