蚊香烟气气溶胶单粒子的粒径和质谱测量

Measurement of Single Particle Size and Mass Spectrum of Mosquito Repellent Smoke Aerosol

在自行研制的气溶胶飞行时间质谱仪上,对两种蚊香烟气气溶胶单粒子的粒径和质谱进行了实时在线测量。通过分析蚊香烟气气溶胶的统计粒径数据和大量单粒子质谱图,发现其粒径主要分布在小粒径的纳米区间,且粒子中可能包含K+、Na+、碳氢化合物离子、重金属元素离子以及多环芳香烃化合物离子如苊、芴和苊烯的分子离子峰C12H10+、C13H10+和C12H8+等物质。并总结出微烟蚊香和有烟蚊香在粒径分布和化学成分等方面的异同点。金彩虹微烟蚊香烟气中包含的Mo+可以作为其区别于雷达有烟蚊香的特征标志。

Aerosol time-of-flight mass spectrometer was used to on-line measure size and mass spectrum of two types of mosquito repellent. Results showed that the particle size of mosquito repellent smoke aerosols was distributed mainly in below 1 micron and K+, Na+, hydrocarbon ion, heavy metal ion Cd+ and PAHs ion including C12H10+, C13H10+ and C12H8+ was likely contained in the single aerosol particle. The sameness and difference of two types of mosquito repellent smoke aerosol were discussed on particle diameter distributing and chemical component. Mo+ may be considered as characteristic symbol to differ Gold Rainbow little smoke mosquito repellent from Raid heavy-smoke one.