Development of high spatial resolution and non-destructive chemical analysis for ice core

本研究的目的是建立一种利用激光诱导荧光法对冰芯中的化学成分进行连续无损分析的技术，使我们能够以1 mm量级的位置分辨率测量ppb量级的杂质浓度。本研究的结论是，成功地研制了由样品在未熔化条件下被激光照射的样品室和部分荧光检测装置组成的装置，使冰钠含量的检测成为可能，并且消耗的冰不到1mm3。目前，钠浓度的最低检测水平为1ppm。为了进一步研究，有必要制备一个含有杂质的均匀样品。

The purpose of this study is to develop a continuous and non-destructive technique to analyze chemical constituents in ice core by using Laser Induced Fluorescence method, which enable us to measure the concentration of impurity in ppb order in position resolution of the order of 1 mm.This study concluded that the device composed of the sample chamber in which a sample can be irradiated by YAG laser under unmelted condition and of detecting part of fluorescence was successfully developed and made it possible to detect of sodium content in ice with consuming less than 1mm^3 of ice. At the moment minimum detection level of sodium concentration is 1 ppm. For further study it is necessary to prepare a sample that contains impurity homogeneously.