Abstract
Two optical technique: laser-induced breakdown spectroscopy (LIBS) and single particle aerosol mass spectrometry (SPAMS) were combined to study Tibetan incense. The ash and smoke of Tibetan incense were online detected with LIBS, and there existed more metal elements in the ash, such as Fe, Mg, Ba, Sr, Mn and so on. SPAMS technique focused on online recording mass spectra of the smoke, and the positive and negative ion spectra were obtained. What’s more, the lead isotopes in Tibetan incense smoke were analyzed and four isotopes (m/z = 204, 206, 207 and 208) were all observed in the mass spectrum. The principal component analysis (PCA) model was also introduced to achieve the clustering and classification of incenses, which could provide a reference for the traceability of particulate matter.
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