Measurements of hydroperoxides (H2O2 and MHP) at ground level were made from 2012 to 2015 in Imizu City, Toyama Prefecture in central Japan. H2O2 and MHP concentrations ranged from 0.01 to 3.5 ppb and from below the level of detection (< 0.01 ppb) to 1.4 ppb, respectively. The concentrations of H2O2 and MHP were high in the summer and low in the winter. The H2O2 concentration was at its maximum in July and August, whereas the concentration of O3 in the daytime was highest in May and June. The ratio of [H2O2]/[SO2] presented clear seasonal variations. Many cases showed the condition of [H2O2] < [SO2], called oxidant limitation especially in the cold months. Hydroperoxide concentrations in the rainwater were also high in the summer. The concentrations of MHP were much lower than those of H2O2 in the rain water. High concentrations of H2O2 (> 2.5 ppb) were detected in the summer during the inflow of air pollution. The concentrations of H2O2 were significantly high in July and August of 2013. The H2O2 was well correlated with the O3 in July and August whereas there was no correlation between O3 and H2O2 in May and June. There was a negative correlation between NOX and H2O2.

中文翻译：

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日本中部农村地区大气氢过氧化物的测量

2012 年至 2015 年在日本中部富山县水市进行了地面氢过氧化物（H2O2 和 MHP）的测量。H2O2 和 MHP 的浓度范围分别为 0.01 至 3.5 ppb 和低于检测水平 (< 0.01 ppb) 至 1.4 ppb。H2O2和MHP的浓度夏季高，冬季低。H2O2 浓度在 7 月和 8 月最高，而白天 O3 浓度在 5 月和 6 月最高。[H2O2]/[SO2] 的比率呈现出明显的季节性变化。很多情况下出现[H2O2]<[SO2]的情况，称为氧化剂限制，尤其是在寒冷的月份。夏季雨水中的过氧化氢浓度也很高。雨水中MHP的浓度远低于H2O2。高浓度 H2O2 (> 2.5 ppb) 在夏季空气污染流入期间被检测到。2013 年 7 月和 8 月 H2O2 浓度显着升高。7 月和 8 月 H2O2 与 O3 的相关性很好，而 5 月和 6 月 O3 与 H2O2 之间没有相关性。NOX 与 H2O2 呈负相关。