对生物和环境样本中的脂肪酸的样本制备和化合物特定稳定同位素分析 (δ2H, δ13C) 的协议
Matthias Pilecky1,2, Leonard I Wassenaar1,2, Sami Taipale3
1WasserCluster Biologische Station Lunz, Inter-University Center for Aquatic Ecosystem Research, Dr. Carl-Kupelwieser Promenade 5, 3293 Lunz/See, Austria.
MethodsX
|December 15, 2023
概括
脂肪酸的化合物特定稳定同位素分析 (CSIA) 提供了对生态系统过程的洞察力. 本协议详细说明了在脂肪酸中准确测量和碳同位素的样品准备.
科学领域:
- 生物地质化学生物地质化学
- 生态同位素学是什么
背景情况:
- 脂肪酸 (FA) 的化合物特异性稳定同位素分析 (CSIA) 对于理解热量动力学和生化途径至关重要.
- 稳定的脂肪酸同位素 (δ2H和δ13C) 提供了对起源和生理过程的独特见解.
- 在获得准确和可重复的CSIA测量方面存在技术挑战.
研究的目的:
- 为脂肪酸稳定同位素分析提供详细的实验室协议.
- 引导研究人员从样本采集到标准化的同位素值确定.
- 为了确保精确和可重复的脂肪酸测量CSIA.
主要方法:
- 详细的样品制备实验室协议,包括脂质提取和转甲基化.
- 为CSIA提供有关仪器设置,数据收集和分析的指导.
- 关于碳和同位素的气色谱 (GC) 单独分析程序的建议.
主要成果:
- 介绍了脂肪酸稳定同位素分析 (CSIA) 的综合方案.
- 该协议涵盖样品制备到特定脂肪酸的标准化δ2H和δ13C值的确定.
- 这些方法在分析前处理过程中最大限度地降低了对δ值的影响.
结论:
- 该协议促进脂肪酸的精确和可重复的特定化合物稳定同位素分析.
- 实施这些标准化的方法提高了对脂肪酸热带转移和命运的理解.
- 建议对C和H同位素进行单独的GC分析,以获得最佳性能.
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