Hydrated alumina as a calibrant for analysis of dust particle samples by single particle infrared spectroscopy
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Date
2016-05
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The Ohio State University
Abstract
Single particle Fourier transform infrared (FTIR) spectroscopy provides the volume fractions of chemical constituents in particulate matter by means of a Mie-Bruggeman model developed by our research group. Other techniques, such as electron microscopy, x-ray methods, and mass spectrometry, provide elemental analysis, and it is known that there is aluminum in many dust samples. We are interested in using single particle infrared spectroscopy to quantify and identify the aluminum containing compounds rather than just the elemental aluminum. The Mie-Bruggeman model currently includes quartz, calcite, dolomite, three types of clay, gypsum, and three types of organic molecules. This works describes the addition of hydrated alumina to the model. The next part of the project will involve applying this model to single particle spectral libraries of dust from our lab air, a house-filter, snow piles from High Street, the 9/11/01 World Trade Center event, and the International Space Station. Identifying the specific composition in such dust samples will yield benefits ranging from scientific understanding to being capable of discerning new health risks.
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Keywords
infrared particle spectroscopy aluminum ftir, ftir mie bruggeman dust particle mesh