Acta Scientiarum Naturalium Universitatis Pekinensis
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JIN Deqiu, ZHOU Xihuang, CHEN Qingchuan, GU Zhennan
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金德秋,周锡煌,陈青川,顾镇南
Abstract: A manual conversion device for microgram level samples(50～100µｇ)of calcium carbonate on benthic foraminifers isotope analyses have been developed for paleoenviroment study. Twenty five samples can be loaded for reaction with 100% orthophosphoric acid continuously one after another in a vacuum system. The standard diviations of measurements on VG SIRA-24 MS are within 0.2% for δ13C and 0.3% for δ18O.
Key words: microgram levels of calcium, 13C, 18O, mass spectrometric analysis
摘要： 本工作研制了一套用于有孔虫等微量碳酸钙样品(50～100µｇ)中碳、氧同位素质谱分析 的磷酸法转化装置。采用磁力进样法，可连续进行25个样品的转化。在VGSIRA-24气体同位素质谱计上测量，分析的标准偏差对δ13C和δ18O分别在±0.2%和±0.3%以内。
关键词: 微量碳酸钙, 13C, 18O, 质谱分析
CLC Number:
O657.6
JIN Deqiu,ZHOU Xihuang,CHEN Qingchuan,GU Zhennan. Mass Spectrometric Analyses of 13C and 18O at Microgram Levels of Calcium Carbonate[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.
金德秋,周锡煌,陈青川,顾镇南. 微量碳酸钙中13C和18O的质谱分析[J]. 北京大学学报（自然科学版）.
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https://xbna.pku.edu.cn/EN/Y1995/V31/I4/426
