Chemical Analysis of PM2.5 during Dry Deforestation Season in Southeast Asia

In Southeast Asia, during the dry season (August to October) forest fires in Indonesia emit pollutants into the atmosphere. For two years during this period, a total of 67 samples of 2.5 μm particulate matters were collected and analyzed for total mass and elemental composition with ICP MS after microwave digestion. A study of 60 elements measured during these periods suggest that the concentration of most of elements, even those usually related to crustal source, are extremely high and unpredictable during the haze period. In By contrast, trace element concentration in non haze months is more stable and covers a lower range. Other unexpected events and their effects on the findings are discussed. Keywords—Haze, ICP MS, Particulate Patter, Transboundary Air Pollution.