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 环境同位素实验室 
首页 > 实验系统 > 环境同位素实验室
环境同位素实验室

实验室名称:环境同位素实验室 

所属系统:支撑平台一-地球物质成分与物质性质分析系统 

实验室位置:地7楼213室 

实验室主任:王旭

联系电话:010-82998581 

 

实验室介绍 

  实验室成立于2003年,配备有MAT253和Delta V plus型同位素比值质谱仪,同时拥有Flash EA 1112型有机元素分析仪、TC/EA高温裂解分析仪、GasBench II多功能气体制备装置、Trace GC 2000型气相色谱仪和Kiel IV碳酸盐反应装置等多台外设,通过与同位素质谱仪的联用可在线分析各类地质样品的碳、氮、氢和氧同位素组成。近年来,实验室运用气体稳定同位素分析技术,开展了古环境、古气候、古生态和同位素地球化学过程等方面的研究。同时,实验室技术人员还不断拓展仪器功能和开发新方法,如磷酸盐氧同位素的制备与分析、碳酸盐耦合同位素(clumped isotopes)的分析等,为古环境研究提供了新的强有力的技术手段。环境同位素实验室对国内外研究人员高质开放,欢迎前来开展合作研究。

 

仪器介绍 

  MAT253同位素比值质谱仪是目前国际上最先进的气体稳定同位素分析仪器,由美国Thermo Scientific公司制造,于2003年引进。它具有较宽的质量数范围(1-150道尔顿),较高的灵敏度(离子/800分子),质量分辨率可达200。MAT253稳定同位素比值质谱仪提供 D/H、13C/ 12C、15N/ 14N、18O/16O和29Si/28Si同位素比值的高精度测定。

 

  

 

  同位素质谱仪分析原理 

  首先将样品转化为纯的气体,待测气体通过扩散或He载气携带进入离子源,在电子轰击作用下变为带电荷的离子,然后经过电场加速后进入磁场,根据质荷比(m/z)的大小以不同半径发生偏转,从而实现对不同质量数的同种分子的分离,最后不同质荷比的带电离子分别被不同位置上的接收杯所接收、计数,通过计算给出同位素组成。下图为CO2气体各同位素的分离、检测示意图。

  

 

  CO2同位素分析示意图

成果展示  

  1. Amiot, R., Wang, X., Zhou, Z., Wang, X., Lécuyer, C., Buffetaut, E., Fluteau, F., Ding, Z., Kusuhashi, N., Mo, J., Philippe, M., Suteethom, V., Wang, Y., Xu, X., Environment and ecology of East Asian dinosaurs during the Early Cretaceous inferred from stable oxygen and carbon isotopes in apatite. Journal of Asian Earth Sciences. 2015, 98: 358-370
  2. Cui L.L., Wang X., Determination of clumped isotopes in carbonate using isotope ratio mass spectrometer: Effects of extraction potential and long-term stability. International Journal of Mass Spectrometry, 2014, 372: 46-50
  3. Cui L.L., Wang X., Determination of carbon and oxygen isotopes of geological samples with a complicated matrix: comparison of different analytical methods. Analytical Methods, 2014, 6 (22): 9173-9178
  4. Chen, Z.L.,Wang, X.,Hu, J.F., Yang, S.L., Zhu, M., Dong, X.X., Tang, Z.H., Peng, P.A., Ding, Z.L., Structure of the carbon isotope excursion in a high-resolution lacustrine Paleocene-Eocene Thermal Maximum record from central China. Earth and Planetary Science Letters. 2014, 408: 331-340
  5. Wang X., Cui L.L., Xiao J.L., Stable carbon isotope of black carbon in lake sediments as an indicator of terrestrial environmental changes: An evaluation on paleorecord from Daihai Lake, Inner Mongolia, China. Chemical Geology, 2013, 347: 123-134
  6. Liu L., Song,Y., Cui L.L., Stable carbon isotopic composition of black carbon in surface soil as a proxy for reconstructing vegetation on the Chinese Loess Plateau, PalaeogeographyPalaeoclimatologyPalaeoecology, 2013, 388:109-114
  7. Wang X., Ding Z.L., Peng P.A., Changes in fire regimes on the Chinese Loess Plateau since the last glacial maximum and implications for linkages to paleoclimate and past human activity. Palaeogeography, Palaeoclimatology, Palaeoecology, 2012, 315: 61-74
  8. Yang, S.L.,Ding, Z.L.,Wang, X., Tang, Z.H., Gu, Z.Y.,Negative delta O-18-delta C-13 relationship of pedogenic carbonate from northern China indicates a strong response of C-3/C-4 biomass to the seasonality of Asian monsoon precipitation, Palaeogeography, Palaeoclimatology, Palaeoecology, 2012, 317: 32-40
  9. Yi, H., Li, T. J., Wang, X., Zhang, F. S., Huo, W. G., Yi, W., Amount of substance measurement homogeneity principle: the discrepancy between XRCD and watt balance results. Metrologia, 2012, 49, 62-69
  10. Sun, J. M., Lü, T. Y., Zhang, Z. Q., Wang, X., Liu, W. G., Stepwise expansions of C4 biomass and enhanced seasonal precipitation and regional aridity during the Quaternary on the southern Chinese Loess Plateau. Quaternary Science Reviews, 2012, 34, 57-65
  11. Ma, Z. B., Cheng, H., Tan, M., Edwards, R. L., Li, H. C., You, C. F., Duan, W. H., Wang, X., Kelly, M. J., Timing and structure of the Younger Dryas events in northern China. Quaternary Science Reviews, 2012,41, 83-93
  12. Zhai, D. Y., Xiao, J. L., Zhou, L., Wen, R. L., Chang, Z. G., Wang, X., Jin, X. D., Holocene East Asian monsoon variation inferred from species assemblage and shell chemistry of the ostracodes from Hulun Lake, Inner Mongolia. Quaternary Research, 2011,75, 512-522
  13. Amiot, R.,Wang, X., Zhou, Z.H., Wang, X.L., Buffetaut, E., Lecuyer, C, Ding, Z.L., Fluteau, F., Hibino, T., Kusuhashi, N., Mo, J.Y., Suteethorn, V., Wang, Y.Q., Xu, X., Zhang, F.S. Oxygen isotopes of East Asian dinosaurs reveal exceptionally cold Early Cretaceous climates, Proceedings of the National Academy of Sciences of the United States of America, 2011, 108 (13): 5179-5183
  14. Amiot, R.,Wang, X., Lecuyer, C., Buffetaut, E., Boudad, L., Cavin, L., Ding, Z.L., Fluteau, F., Kellner, A.W.A., Tong, H.Y., Zhang, F.S., Oxygen and carbon isotope compositions of middle Cretaceous vertebrates from North Africa and Brazil: Ecological and environmental significance, Palaeogeography, Palaeoclimatology, Palaeoecology, 2010, 297 (2): 439-451
  15. Zhu, M., Ding, Z.L.,Wang, X., Chen, Z.L., Jiang, H.C., Dong, X.X., Ji, J.L.,Tang, Z.H., Luo, P., High-resolution carbon isotope record for the Paleocene-Eocene thermal maximum from the Nanyang Basin, Central China, Chinese Science Bulletin, 2010, 55 (31): 3606-3611
  16. Wang, X., Feng, L. J., Zhang, F. S. and Ding, Z. L., On-line measurements of d15N in biological fluids by a modified continuous-flow elemental analyzer with an isotope-ratio mass spectrometer. Rapid Commun. MassSpectrom., 2008, 22: 1196-1202
  17. Cai, B., Edwards, R. L., Cheng, H., Tan, M., Wang, X. and Liu, T., A dry episode during the Younger Dryas and centennial-scale weak monsoon events during the early Holocene: A high-resolution stalagmite record from southeast of the Loess Plateau, China. Geophys. Res. Lett.,2008,35, L02705, doi:10.1029/2007GL030986.
  18. 崔琳琳,王旭,沈吉,丁仲礼,末次盛冰期以来泸沽湖沉积记录的正构烷烃分布特征和单体碳同位素组成及其古植被意义,第四纪研究,2015,35(4):871-880
  19. 崔琳琳,王旭,Gas Bench II/IRMS测定碳酸盐氧同位素:酸分馏系数差异的讨论,地球环境学报,2013,3(4): 923-928
  20. 杜广鹏,王旭,张福松.GasBench II 顶空瓶内空气背景对<100μg碳酸盐中碳氧同位素在线测定的影响及校正方法初探. 岩矿测试,2010, 29 (6), 631-638
  21. 王旭, 张福松, 丁仲礼, EA-Conflo-IRMS联机系统的燃烧转化率漂移及其对氮、碳同位素比值测定的影响. 质谱学报, 2006, 27, 104-109. 

  

实验室成员 

  

  王旭:博士,副研究员,第四纪地质学专业,目前为环境同位素实验室技术负责。主要研究方向为古气候与古环境研究,包括:古火历史重建及其与气候和人类活动关系研究、地质时期高温期(如PETM时期)古气候研究等。同时,负责稳定同位素质谱仪的功能拓展与新方法开发。

  Email: xuking@mail.iggcas.ac.cn

  电话: 010-82998581

  办公地点:地7楼213室

  

  崔琳琳:硕士,工程师,环境科学专业。主要负责仪器的日常维护及运行,参与仪器新方法的研究。

  Email: cuilinlin@mail.iggcas.ac.cn

  电话: 010-82998581

  办公地点:地7楼213室

 

收费须知 

  测试价格(连续流系统进样):

测试项目  

样品  

样品量  

所内收费元/  

所外收费元/  

碳、氧同位素  

d13C d 18O  

方解石、白云石、灰岩等  

10毫克200  

250  

300  

有机碳d13C  

沥青、干酪根、动物、昆虫组织、土壤等  

不少于100ug C  

200  

300  

350  

氮同位素d15N  

沥青、干酪根、动物、昆虫组织、土壤等  

不少于100ug N  

200  

300  

350  

氧同位素d18O  

磷酸盐、硫酸盐、硝酸盐、有机物等  

不少于100ug O  

200  

350  

400  

  说明:所内收费优惠是指本所学生在实验室老师的指导下协助完成实验的情况;如果完全委托本实验室进行样品分析,则所内外收费价格一样。另外优先安排本所样品。

 
 
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