title: [Henry's law constant measurement for hydrogen peroxide using oxidative decoloration of BPR].
abstract: The temperature-dependent Henry's Law Constant for hydrogen peroxide was measured. The gas phase of hydrogen peroxide from the vapor saturator collected in a cryogenic trap was analyzed by a spectrophotometric determination, based on the oxidative decoloration of BPR (bromopryogallol red) reaction with hydrogen peroxide under the catalysis of hemin. At 10 degrees C - 35 degrees C, the relationship between Henry's Law constant K(H) (mol x L(-1) x atm(-1)) of hydrogen peroxide and temperature T (K) can be expressed as ln K(H) = a/T - b, where a = 7 269+/-22, and b = 13.26+/-0.08. The standard heat of hydrogen peroxide aqueous solution is 60.43+/-0.18 kJ x K(-1) x mol(-1).
authors.affiliation: The State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871, China.
authors.forename: Zhong-ming
authors.initials: ZM
authors.lastname: Cheng
authors.forename: Xiao-cao
authors.initials: XC
authors.lastname: Qu
mesh_terms: D002384:Catalysis; D005740:Gases / Q000737:chemistry; D006427:Hemin / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D010084:Oxidation-Reduction; D011748:Pyrogallol / Q000737:chemistry*; D012996:Solutions; D013053:Spectrophotometry / Q000295:instrumentation / Q000379:methods*; D013696:Temperature; D013816:Thermodynamics
chemical_list: D005740:Gases; D012996:Solutions; C109304:bromopyrogal red; D011748:Pyrogallol; D006427:Hemin; D006861:Hydrogen Peroxide