The Investigation of Pyrolysis Method for Separation of Carbonaceous Component in Airborne Particulate Matter

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The various conditions of pyrolysis method have been developed for separation and determination of both organic and elemental carbon contents in airborne particulate matter because of its facility and simplicity. The following several conditions for pyrolysis were studied. (1) (in inert gas) Organic carbon ≤ 650 °C < Elemental carbon (in the presence of Oxygen) (2) (in inert gas) Organic carbon ≤ 450 °C < Elemental carbon (in the presence of Oxygen) (3) (in inert gas) Organic carbon ≤ 400 °C < Elemental carbon (in the presence of Oxygen) (4) (in air) Organic carbon ≤ 350 °C < Elemental carbon (in air) (5) (in air) Organic carbon ≤ 300 °C < Elemental carbon (in air) These conditions of pyrolysis method were applied to airborne particulate matter at Tsukuba, Pepperbush (NIES CRM No. 1) and Vehicle Exhaust Emission particulates (NIES CRM No. 8). Consequently, it was found that the pyrolysis method in inert gas (item (1)(2)(3)) has a tendency to overestimate elemental carbon content in samples because of carbonization during the removing procedure of organic carbon. On the other hand, strict control is required for the pyrolysis conditions in air (item (4)(5)) because of the quick ashing of the samples. In conclusion, the pyrolysis method in helium carrier gas at heating temperature of 500 °C and heating period of 10 minutes is recommended for separation of carbonaceous content in airborne particulate matter.
日本エアロゾル学会の論文

The Investigation of Pyrolysis Method for Separation of Carbonaceous Component in Airborne Particulate Matter

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