同步辐射单光子电离在二次有机气溶胶研究中的应用

The Use of Synchrotron Vacuum Ultraviolet Photoionization in the Study of Secondary Organic Aerosol

本文介绍了国家同步辐射实验室新建立的二次有机气溶胶试验站及获得的初步实验结果。同步辐射光源可以提供高亮度、高准直性和波长连续可调的真空紫外光。真空紫外光电离是单光子过程,可以克服电子束轰击电离和激光光电离的分子碎片多的缺点,与飞行时间质谱结合,能够有效探测气溶胶的化学成分,尤其是二次有机气溶胶的化学成分。该方法为深入研究挥发性有机物光氧化生成二次有机气溶胶的动力学及其形成机理,提供了一种全新的研究手段。

The newly-built secondary organic aerosol experimental establishment and obtained primary experimental result from the National Synchrotron Radiation Laboratory were introduced in this work. The synchrotron radiation light source can provide high brightness, high collimation and continuously adjustable wavelength vacuum ultraviolet. The vacuum ultraviolet photoionization is a single photon process which can overcome the defect of more fragments from the electron beam bombardment and laser light. It can detect the chemical component from the secondary organic aerosol effectively combing with time of flight mass. The synchrotron radiation vacuum ultraviolet single photoionization provide a new method in the research of dynamics and formation mechanism about the secondary organic aerosol from volatile organic compounds.