[1] [1] Molina M J. Polar ozone depletion [J]. Angew. Chem. Int. Ed. Engl, 1996, 35: 1778-1785.

[2] [2] Moren F, Dolovich M B, Newhouse M T, et al. Aerosol characterization and generation [C]. Aerosols in Medicine: Principles, Diagnosis and Therapy [M]. 2nd ed., Amsterdam: Elsevier, 1993, 321.

[3] [3] Dockery D W, Pope C A. Acute respiratory effects of particulate air pollution [J]. Annu. Rev. Public Health, 1994, 15: 107-132.

[4] [4] Prather K A, Nordmeyer T, Salt K. Real-time characterization of individual aerosol particles using time-of-flight mass spectrometry [J]. Analytical Chemistry, 1994, 66: 1403-1407.

[5] [5] Salt K, Noble C A, Prather K A. Aerodynamic particle sizing versus light scattering intensity measurement as methods for real-time particle sizing coupled with time-of-flight mass spectrometry [J]. Analytical Chemistry, 1996, 68: 230-234.

[6] [6] Daszykowski M, Walczak B, Massart D L. Representative subset selection [J]. Analytica Chimica Acta, 2002, 468(1): 91-103.

[7] [7] Zhou Liming, Hopke P K, Venkatachari P. Cluster analysis of single particle mass spectra measured at flushing, NY [J]. Analytica Chimica Acta, 2006, 555: 47-56.