School of Petrochemical Engineering;
Lanzhou University of Technology;
Lanzhou 730050;
China;
Gansu Food Inspection and Research Institute;
Lanzhou 730050;
China;
State Key Joint Laboratory of Environment Simulation and Pollution Control(Peking University);
College of Enuironmental Sciences and Engineering;
Peking University;
Beijing 100871;
China;
Atmosphere; Determination method; Hydroxyl radical; Hydroperoxyl radical; Troposphere;