Sodemann Harald, Mørkved Pål Tore, Wahl Sonja
Geophysical Institute, University of Bergen, Bergen, Norway.
Bjerknes Centre for Climate Research, Bergen, Norway.
MethodsX. 2023 Jul 27;11:102297. doi: 10.1016/j.mex.2023.102297. eCollection 2023 Dec.
Precise and accurate measurements of the stable isotope composition from precipitation, land ice, runoff, and oceans provide critical information on Earth's water cycle. The analysis, post-processing, and calibration of raw analytical signals from laser spectrometers during sample analysis involves a number of critical procedures to counteract instrumental drift, inter-sample memory effects, and the quantification of total uncertainty. We present a new software tool for the post-processing and calibration named FLIIMP (FARLAB Liquid Water Isotope Measurement Processor). FLIIMP facilitates sample processing by (1) a graphical user interface that guides the user along the processing steps from corrections for memory effects, drift, and mixing ratio to calibration, and (2) allows to monitor long-term measurement system behaviour, currently for Picarro-brand water isotope analysers. Final data files are accompanied by a detailed calibration report. Being an open-source software for the major operating systems, users can adapt FLIIMP to their laboratory environment, and the community can contribute the software development. •FLIIMP facilitates post-processing, calibration and reporting for stable water isotope liquid sample analysis.•The stepwise, interactive graphical user interface reduces possibility of errors and shortens processing time.•Open source software enables future development of FLIIMP by the user community.
对降水、陆地冰、径流和海洋中稳定同位素组成进行精确测量，可为地球水循环提供关键信息。在样品分析过程中，对激光光谱仪原始分析信号进行分析、后处理和校准，涉及许多关键程序，以抵消仪器漂移、样品间记忆效应以及量化总不确定度。我们提出了一种名为FLIIMP（FARLAB液态水同位素测量处理器）的后处理和校准新软件工具。FLIIMP通过以下方式促进样品处理：（1）一个图形用户界面，引导用户完成从记忆效应校正、漂移校正、混合比校正到校准的处理步骤；（2）允许监测长期测量系统行为，目前适用于Picarro品牌的水同位素分析仪。最终数据文件附带详细的校准报告。作为适用于主要操作系统的开源软件，用户可以根据自己的实验室环境对FLIIMP进行调整，并且社区可以为软件开发做出贡献。•FLIIMP便于对稳定水同位素液态样品分析进行后处理、校准和报告。•逐步的交互式图形用户界面减少了出错可能性并缩短了处理时间。•开源软件使FLIIMP能够在用户社区中得到进一步开发。
