<論文>海洋環境中に存在する粒子のX線マイクロアナライザーによる元素分析法

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A method of elemental analysis for particulate matters was developed by using X-ray microanalyser which consists of Scanning Electron Microscope and Energy Dispersive X-ray spectrometer. We attempted to find the best condition of four sensitive parameters to run the program for quantitative analysis. As a result of examination, accelerating voltage 15 kV, probe current=3 X 10^<-9> A, window thickness ratio = 1.34,and acquisition time = 60s were obtained for the mineral standard sample (K-feldspar). The measured values were agreed well with the certified values for the major components (>5 %) within 5 % errors. The relative standard deviation of major components is within <2 % on 10 repeated measurements for the three different matrix glass standards. This method successfully applied to filter samples which particulate matters formed a thin film on the filter surface. Particulate matters obtained from atmosphere, seawater, and sediment were determined. Dominant particles contained major components such as SiO_2,Al_2O_3,and CaCO_3. Our set up parameters based on the mineral standard are suitable for the quantitative analysis of various particles in marine environment.
1996-03-21