An Approach to Analysis of Stable Isotopes in Microsamples  

作　　者：韩友科 安娜 

机构地区：[1]Yichang Institute of Geology and Mineral Resources,CAGS,Yichang,443003

出　　处：《Chinese Journal Of Geochemistry》1991年第4期372-378,共7页中国地球化学学报

摘　　要：A new aproach to isotopic analysis of carbon,oxygen,sulfur and nitrogen in microsamples has been established.Samples were conventionally prepared by mixing microsamples to be analyzed with reference samples with known δ values in a proper proportion,and then analyzed for their stable isotopes as those at ordinary levels.According to the equilibrium relationships before and after mixing,the δvalues of unknown microsamples were calculated.The δ^15N of the atmosphere was estimated at zero by this approach,which is concordant with the internationally recommended value.A new approach to isotopic analysis of carbon,oxygen,sulfur and nitrogen in microsamples has been established.Samples were conventionally prepared by mixing microsamples to be analyzed with reference samples with known δ values in a proper proportion,and then analyzed for their sta- ble isotopes as those at ordinary levels.According to the equilibrium relationships before and after mixing,the δ values of unknown microsamples were calculated.The δ ^(15)N of the atmosphere was estimated at zero by this approach,which is concordant with the internationally recommended value.

关 键 词：稳定同位素 碳同位素 氧 硫 氮 微量取样 

分 类 号：P597.2[天文地球—地球化学]