We analyzed the products mixture of the gas-phase reaction of β-pinene with ozone, using GC/ MS and confirmed nopinone as the main product of the reaction. No other large carbonyls were found in our experiments. 利用GC/MS技术分析了β-蒎烯/O3气相反应的混合产物,确定反应的主要产物为诺蒎酮,本实验条件下没有发现其它大分子羰基化合物。