普通X射线荧光光谱法用于中太平洋富钴结壳中锰价态的定量分析
Quantitative Analysis of Valences for Manganese in Cobalt-rich Crust Samples from the Central Pacific Ocean by X-ray Fluorescence Spectrometry
-
摘要: 应用普通X射线荧光光谱仪，结合PeakFit谱峰处理软件，对不同比例的MnO和MnO2的人工混合样品的谱峰参数进行了研究，用数学方法将实测的谱峰分解为各个单一的谱峰参数（峰位、峰高、半高宽、子峰积分面积），找出了各个谱峰参数与不同价态锰含量之间的关系，并据此确定了中太平洋海山区大量富钴结壳样品中Mn^4＋的相对含量，主要集中在80％～100％。总结了富钴结壳中中层和表层Mn^4＋的含量高、核心层Mn^4＋的含量低的变化规律．认为这与该区第四纪以来南极底流活动的增强有关。Abstract: The Kβspectral peak parameters of the mixed samples with different ratios of MnO and MnO2 were studied using a conventional X-ray fluorescence spectrometer and PeakFit spectral processing software. The measured spectra were decomposed into various single spectral peak parameters such as peak position, peak intensity and FWHM etc. by deconvolution of overlapped spectral peaks. The relationship between the peak parameters and the contents of different Mn valences was studied. According to the results, the relative contents of the Mn4+ in a large number of cobaltrich crust samples from the central Pacific seamount area were quantified with the range of 80%~100%. It summarized a law that the content of Mn4+ is high in cobaltrich crusts′ outer layer and middle layer, but low in cobalt rich crusts′ inner layer. It is thus proposed that the changes of Mn4+ content in cobalt rich crusts could be the result of Antarctic bottom water activity since the Quaternary period.
-
Key words:
- X-ray /
- fluorescence /
- spectrometry /
-
-
计量
- 文章访问数: 1460
- PDF下载数: 1
- 施引文献: 0
下载: