Mass Spectrometric Analyses of 13C and 18O at Microgram Levels of Calcium Carbonate

Acta Scientiarum Naturalium Universitatis Pekinensis

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Mass Spectrometric Analyses of ¹³C and ¹⁸O at Microgram Levels of Calcium Carbonate

JIN Deqiu, ZHOU Xihuang, CHEN Qingchuan, GU Zhennan

Department of Chemistry, Peking University, Beijing, 100871

Received:1994-03-01 Online:1995-03-20 Published:1995-03-20

微量碳酸钙中¹³C和¹⁸O的质谱分析

金德秋,周锡煌,陈青川,顾镇南

北京大学化学系，北京，100871

Abstract

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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Mass Spectrometric Analyses of ¹³C and ¹⁸O at Microgram Levels of Calcium Carbonate

微量碳酸钙中¹³C和¹⁸O的质谱分析

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