摘要
利用 2种基于高效液相色谱技术的大气OH测量方法测定了北京城市大气中OH自由基 ,得到了其浓度水平和日变化情况 .测得夏季日间最大OH浓度为～ 8× 1 0 7cm- 3,秋季日间最大浓度为 2× 1 0 7～ 4× 1 0 7cm- 3,并根据同步测量光强和其它污染物的浓度 ,分析了OH浓度与这些条件的相关性 .结果表明 ,OH浓度与UV B相对强度、O3和HNO2 的浓度具有一定的正相关性 ,而与NOx 浓度具有反相关性 .
The measurement of atmospheric hydroxyl radicals (OH) in Beijing was carried out using two methods based on high performance liquid chromatography (HPLC). The diurnal variation of OH concentration was obtained. The maximum concentration during sunny daytime was about 8×10 7 cm -3 in summer, while it decreased to about 2×10 7～4×10 7 cm -3 in autumn. The relationships between OH and other pollutants were studied and discussed. Positive linear correlation between OH and UV B intensity, O 3, HNO 2 was observed, while negative correlation between OH and NO x was found.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2002年第4期24-27,共4页
Environmental Science
基金
国家自然科学基金资助项目 (40 0 75 0 2 6
2 9837190 )
