^(12)CO_2/^(13)CO_2体系中碳同位素的显微激光拉曼光谱研究  

Micro-Laser Raman Spectroscopy Study of Carbon Isotope in System ^(12)CO_2/^(13)CO_2

作　　者：李佳佳[1] 李荣西[1] 董会[2] 王志海[2] 赵帮胜 王宁[1] 

机构地区：[1]长安大学地球科学与资源学院,陕西西安710054 [2]中国地质调查局西安地质调查中心,陕西西安710054

出　　处：《分析科学学报》2016年第4期480-484,共5页Journal of Analytical Science

基　　金：国家自然科学基金(No.41173055)

摘　　要：采用自行设计的装置制备了一系列不同比例的12CO2/13 CO2混合物,对混合物样品进行显微激光拉曼测试,获得CO2气体碳同位素分子的拉曼特征峰。对实验数据分析发现,12CO2的摩尔分数[x(12CO2)]与12CO2/13 CO2混合物中拉曼特征峰峰面积比之间存在数学关系式。根据拟合的关系式,利用显微激光拉曼光谱可以预测CO2气体碳同位素的组成,并为以后预测单个流体包裹体中12CO2的摩尔分数奠定了理论基础。In this paper a series of ^12 CO2 /^13 CO2 binary mixtures with various molar fraction ratios were prepared by a home made device. The spectral characteristics of the CO2 carbon isotopes were tested and analyzed by Micro-Laser Raman spectroscopy. It was found that the relationship between 12CO2 mole fraction [x （^13CO2 ）1 and peak area ratio of ^12CO2/13 CO2 [^（A-^[12] ＋ A4^[12]）/（A-^[13] ＋ A＋^[13] ）] in Raman spectra of CO2 binary mixtures showed a polynomial correlation. It is possible to measure carbon isotopic composition and make a prediction for ^12CO2 mole fraction in fluid inclusions.

关 键 词：显微激光拉曼光谱 CO2气体 碳同位素 拉曼峰面积比 流体包裹体 

分 类 号：O657.37[理学—分析化学]