title: Rapid determination of hydrogen peroxide in pulp bleaching effluents by headspace gas chromatography.
abstract: A headspace gas chromatographic (HS-GC) method has been developed for the determination of residual hydrogen peroxide in pulp bleaching effluents. The method is based on the reaction of hydrogen peroxide and permanganate in an acidic medium (0.1 mol/L), in which hydrogen peroxide is quantitatively converted to oxygen within 10 min at 60°C in a sealed headspace sample vial. The released oxygen is then determined by GC equipped with a thermal conductivity detector. The method is robust, sensitive, and accurate, with reproducibility characterized by a relative standard deviation of <0.5%, a sensitivity whose limit of quantification (LOQ) is 0.96 μmol, and a demonstrated recovery ranging from 98 to 103%. Further, the method is simple, rapid, and automated.
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China.
authors.forename: Hui-Chao
authors.initials: HC
authors.lastname: Hu
authors.forename: Hui-Jun
authors.initials: HJ
authors.lastname: Jin
authors.forename: Xin-Sheng
authors.initials: XS
authors.lastname: Chai
mesh_terms: D002849:Chromatography, Gas / Q000191:economics / Q000379:methods*; D006861:Hydrogen Peroxide / Q000032:analysis* / Q000737:chemistry; D007220:Industrial Waste / Q000032:analysis*; D057230:Limit of Detection; D017895:Manganese Compounds / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010100:Oxygen / Q000032:analysis / Q000737:chemistry; D015203:Reproducibility of Results; D013997:Time Factors
chemical_list: D007220:Industrial Waste; D017895:Manganese Compounds; D010087:Oxides; C048856:permanganic acid; D006861:Hydrogen Peroxide; D010100:Oxygen