2. the origin and significance of
At present, air pollution is considered to be environmental issues that are important to the vicinity.Due to the air pollution it can spread quickly and cause wide area effects due to bad health, as well as to increase the number of illnesses and deaths in both the general public and groups at risk include: The elderly, people with respiratory symptoms, chronic illness. And heart disease.Especially in the major cities that have large numbers of population. There are traffic, traffic, and many industrial factories. Keep more sources of pollution. The dust is one of the pollution that is causing such effects which the dust is the birthplace for several reasons, such as agriculture, industry, transportation, etc.Dust originating from a different source, it will have elements and different toxicity. Therefore, the composition of the dust, so it's important that I know the sources and properties. .
For analysis and characterization of the elements of the dust is an analysis of the quantity element in the sample, which is much less. X-ray fluorescence methods can (XRF) Fluid and suspension, and has been used for study of the elemental composition of the sample. Based on the difference of the power level of each element, thus making possible indicates the type of the elements contained in the sample. And, Alternatively, neutron activation analysis (NAA). Is a technique that can analyze chemical quantity is less than one in a million parts easily and precisely identify the types and quantities of elements in a sample by using the neutron particle, acts as an antioxidant to RT kammantaphap example?Needs analysis. Gamma radiation is measured and the release comes out that these two techniques are State-of-the-art technology suitable for Quantitation of low-volume element.
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