In light of the principle of vanadium's valent state change,after samples are dissolved by weak nitric acid,in medium of around 15% nitric acid,the oxidant ammonium persulphate is immediately used to selectively oxidize V~(4+) to V~(5+).

With industrial monomer solution of dimethyldiallylammonium chloride(DMDAAC) as raw material,ammonium persulphate(APS) as initiator and Na_4EDTA as chelating agent,using the methods of adding initiator all at once,graduated increasing of temperature and stepwise initiation and polymerization,the polymerization process of preparing poly-dimethyldiallylammonium chloride(PDMDAAC) was researched.

Poly-dimethyldiallylammonium chloride(PDMDAAC)was prepared by using industrial dimethyldiallylammonium chloride(DMDAAC)aqueous solution with known impurities as starting material,ammonium persulphate(APS)as initiator,without addition of any transferring and terminating agents.

Determination of Ketoprofen Using Its Adsorbed Association/Parallel Polarographic Catalytic Wave in the Presence of Persulfate;

The polymerization of AM initiated by the MAAECz and potassium persulfate was studied kinetically.

Catalytic spectrophotometric determination of trace nickelⅡ in water based on discoloring reaction of congo red by oxidation of potassium persulfate;

Factor Affecting the Determination of Water Quality Total Nitrogen by Alkaline Potassium Persulfate Digestion;

Hg oxidative absorption in potassium persulfate solution catalyzed by Cu~ 2+;