京广地区大气过氧化物浓度测定及影响因素分析

Variation of Concentration of Atmospheric Peroxides in Beijing and Guangzhou

利用高效液相色谱测定了北京和广州地区大气过氧化物浓度 ,并分析了相关因素对过氧化物浓度变化的影响。北京地区在 5月、6月和 9月 3个监测时段中H2 O2 的平均浓度分别为 2 33× 10 -9、0 338× 10 -9和 0 14 8× 10 -9;广州 11月H2 O2 的平均浓度为 0 16 8× 10 -9(VH2 O2 /Vair)。植物排放对有机过氧化物的生成有一定贡献 ,有机过氧化物浓度变化与H2 O2 浓度变化具有较好的一致性。过氧化物浓度与O3 和甲醛浓度表现出较好的正相关性 ,而与SO2 浓度则表现出负相关性。

The concentration of peroxides in atmosphere in Beijing and Guangzho u was measured by using the HPLC post-column derivatization system. The H 2 O 2 av erage concentration was 2.33×10 -9、0.338×10 -9 an d 0 148×10 -9(V H 2O 2/V air) respectively in May, June and September, 2000 in Beijing. The H 2O 2 a verage concentration was 0.168×10 -9?(V H 2O 2/V air) in N ovember, 2000, in Guangzhou. The factors that affected peroxides were discussed. The results showed that peroxide concent ration was high in daytime and low at night in both sites. Variation of concentr ation of organic peroxide is similar to that of hydrogen peroxide. The concentra tion of peroxides has positive correlation with that of O 3 and HCHO.