[利用溴酚红氧化褪色法测定过氧化氢的亨利定律常数]
[Henry's law constant measurement for hydrogen peroxide using oxidative decoloration of BPR].
作者信息
Cheng Zhong-ming, Qu Xiao-cao
机构信息
The State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871, China.
出版信息
Guang Pu Xue Yu Guang Pu Fen Xi. 2005 Jul;25(7):1114-7.
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).
测量了过氧化氢的温度依赖性亨利定律常数。通过分光光度法测定收集在低温阱中的来自蒸汽饱和器的过氧化氢气相，该方法基于在血红素催化下过氧化氢与溴邻苯三酚红（BPR）反应的氧化褪色。在10℃至35℃范围内，过氧化氢的亨利定律常数K(H)（mol·L⁻¹·atm⁻¹）与温度T（K）之间的关系可表示为ln K(H)=a/T - b，其中a = 7269±22，b = 13.26±0.08。过氧化氢水溶液的标准热为60.43±0.18 kJ·K⁻¹·mol⁻¹。
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