于2009年3月11日-5月29日在衡山采集云雾水样品,采用荧光分光光度法对样品中的总过氧化氢浓度进行了测定,分析了衡山云雾水中总过氧化氢的浓度特征及气象影响因素.结果表明,衡山云雾水中总过氧化氢平均浓度为8.46μmol/L,呈现出明显的日夜浓度差异.分析风向、风速、辐射强度和温度对云雾水总过氧化氢浓度的影响,发现总过氧化氢浓度与风速问存在明显的负相关关系,风向主要来自海洋时,其浓度较高,来自陆地时则较低,这与来自陆地的气流携带有大量的氮氧化物和二氧化硫有关.此外,总过氧化氢浓度随温度的升高具有明显增加的趋势,且当辐射强度大于50 w/m2时,总过氧化氢与辐射强度呈良好的正相关,相关系数为0.713,说明总过氧化氢的浓度分布与光化学反应关系密切.%Total peroxides concentrations in cloud water samples collected at Mount Heng were evaluated and meteorological factors affecting them were studied. Individual cloud events were sampled from March 11 th to May 29th 2009, and concentrations of total peroxides were analyzed using fluorescence spectroscopy. The average concentration of total peroxides was 8. 46 μmol/L which showed a significant difference between day and night. The influence of wind direction, wind speed, radiation intensity and temperature on total peroxides were analyzed, and it was found that when wind came from sea which contained less nitrogen oxides and sulfur dioxide, the concentration of total peroxides was higher, and there was a clear negative correlation between wind speed and concentration of total peroxides. In addition, the concentration of total peroxides significantly increased with an increase of temperature and radiation intensity, when radiation intensity was greater than 50 w/m , and the correlation coefficient was 0. 713 which indicated that the concentrations of total peroxides was closely related to photochemical reactions.
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