Measurements of hydrogen peroxide in polar ice samples
Measurements of hydrogen peroxide in polar ice samples
复制标题
极地冰样本中过氧化氢的测量
作者：
Albrecht Neftel;P. Jacob;D. Klockow
过氧化氢是一种强氧化剂，被认为是云层中二氧化硫氧化为硫酸的关键成分。1874年首次报道了雪、雨、霜和雾中h2o2的定量测量（参考文献2），然而，对降水和水成物中h2o2浓度的系统调查仅在几年前才开始。我们在此报告极地冰样品中过氧化氢的测量结果。据我们所知，化学反应物质以前还没有在冰芯样本中分析过。我们的测量表明，h2o2是在偏远和清洁地区的云层中存在的主要微量化合物。
Hydrogen peroxide, a powerful oxidant, is believed to be a key component in the oxidation of SO2to H2SO4in clouds1. The first quantitative H2O2measurements in snow, rain, hoarfrost and fog were reported in 1874 (ref. 2), however, systematic investigations of H2O2concentrations in precipitation and hydrometeors began only a few years ago3,4. We report here measurements of hydrogen peroxide in polar ice samples. To our knowledge, chemically-reactive species have not been previously analysed in ice core samples. Our measurements show that H2O2is a dominant trace compound present in clouds over remote and clean areas.