岩矿测试2012，Vol.31Issue(4)：627-631,5.
元素分析仪-同位素比值质谱仪测定海洋沉积物有机碳稳定同位素方法初探
A Preliminary Study on the Determination of Organic Carbon Stable Isotope of Marine Sediment by Element Analyzer-Isotope Ratio Mass Spectrometer
摘要
Abstract
Element Analyzer-Isotope Ratio Mass Spectrometer (EA-IRMS) technology was applied to determine organic carbon stable isotopes of marine sediment. Pure C02 reference gas was calibrated via GBW 04408, and the δCtsPDB value of pure CO2 was determined to be -32.053‰. The stability and linearity of the EA-IRMS system were tested and verified through several experimental comparisons. The standard deviation of stability was 0.009‰. When ion intensities ranged from 0.4 to 8.7 V, the linearity of EA-IRMS system was 0.0337‰/V which was less than the requirement of linearity proxy of 0. 06‰/V. Moreover, the precision and accuracy of the results for the national standard material of GBW 04408, international standard material of Urea and marine sediment sample of M01 were measured. The standard deviation was 0. 13‰. The marine sediment samples were measured at three different labs. The standard deviation of the comparison results was less than 0. 20‰ and met the need of reproducibility of 0. 5‰. The TOC contents from marine sediment samples ranged from 0. 13‰ to 1. 11‰, with δ13Corg values ranging from -25. 29‰ to -22. 30‰, which indicate the derivation of organic matter from mixed terrestrial and marine organic materials.关键词
海洋沉积物/有机碳稳定同位素/元素分析仪-同位素比值质谱法Key words
marine sediment/ organic carbon stable isotope/ Element Analyzer-Isotope Ratio Mass Speetrometry分类
化学化工引用本文复制引用
张媛媛,贺行良,孙书文,朱志刚..元素分析仪-同位素比值质谱仪测定海洋沉积物有机碳稳定同位素方法初探[J].岩矿测试,2012,31(4):627-631,5.基金项目
中国地质大调查项目(1212011120271) （1212011120271）
