Numerical inversion method for improving spatial resolution of elemental imaging by laser ablation-inductively coupled plasma-mass spectrometry
Numerical inversion method for improving spatial resolution of elemental imaging by laser ablation-inductively coupled plasma-mass spectrometry
复制标题
激光烧蚀-电感耦合等离子体质谱提高元素成像空间分辨率的数值反演方法
DOI：
10.1039/c7ja00334j
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Jun-Ichi Kimura
中科院分区：
文献类型：
--
作者：
Toru Aonishi;Takafumi Hirata;Tatsu Kuwatani;Masuto Fujimoto;Qing Chang;Jun-Ichi Kimura
To improve the spatial resolution of the two-dimensional elemental images of solid organic and inorganic materials, a novel numerical correction method was developed for laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS). Diffusion and dilution of LA aerosol particles in the carrier gas during transportation from the LA cell to the ICP are the major cause of image diffusion along the axis of a one-dimensional line scan. The correction calculations use (1) numerical forward modelling of the diffused elemental signals and (2) a non-negative signal deconvolution inversion calculation technique to retrieve the original signal profiles. This method improves spatial resolution with a semi-quantitative determination of the ablated masses. We used this method to sharpen the spatial distribution images of rhodium particles contained within a meteorite sample.
