使用基尔IV装置在长期集成双入口模式下对 (生物) 亚酸盐的聚合同位素分析
Mattia Tagliavento1, Sven Hofmann1, Michael Ernst Böttcher2,3,4
1Institute of Geosciences, Goethe University Frankfurt, Frankfurt am Main, Germany.
Rapid communications in mass spectrometry : RCM
|November 13, 2023
概括
生物酸盐的聚合同位素 (Δ47) 分析现在需要更少的材料,可以准确地确定已灭绝的脊椎动物的体温. 一种新的方法有效地去除了二次石,改善了古气温重建.
科学领域:
- 古气候学 古气候学
- 地质化学 地质化学
- 古生物学的古生物学
背景情况:
- 聚合同位素 (Δ47) 分析生物酸衍生的二氧化碳对于确定灭绝的脊椎动物体温至关重要.
- 传统的方法需要大样本大小,并与二次石污染作斗争.
研究的目的:
- 为了评估基尔IV装置在Δ47分析中减少样本大小的有效性.
- 测试一种预处理方法,用于从生物酸盐中去除二次石.
- 为已灭绝的脊椎动物建立准确的古气温测量.
主要方法:
- 使用基尔IV装置进行Δ47分析,测试带有和没有水槽的模式.
- 应用1M酸 (pH5) 预处理来去除二次酸盐.
- 通过基于双入口的质谱法比较结果.
主要成果:
- 具有水槽的基尔IV装置显著降低了样本大小要求.
- 生物酸盐 (不包括牙) 的 Δ47 值与纯碳酸盐的统一温度关系相匹配.
- 酸预处理成功地恢复了生物酸/酸盐混合物的原始Δ47值.
结论:
- 通过基尔IV装置和有效的水分去除,可以对低有机生物酸盐 (例如,质) 进行准确的Δ47分析.
- 1M酸 (pH5) 预处理1小时有效地从含碳酸盐的酸盐中去除二次酸盐.
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