Isotope Hydrology Section, International Atomic Energy Agency , Vienna International Center, Vienna, Austria , A-1400.
Environ Sci Technol. 2014 Jan 21;48(2):1123-31. doi: 10.1021/es403354n. Epub 2014 Jan 3.
The measurement of δ(2)H and δ(18)O in water samples by laser absorption spectroscopy (LAS) are adopted increasingly in hydrologic and environmental studies. Although LAS instrumentation is easy to use, its incorporation into laboratory operations is not as easy, owing to extensive offline data manipulation required for outlier detection, derivation and application of algorithms to correct for between-sample memory, correcting for linear and nonlinear instrumental drift, VSMOW-SLAP scale normalization, and in maintaining long-term QA/QC audits. Here we propose a series of standardized water-isotope LAS performance tests and routine sample analysis templates, recommended procedural guidelines, and new data processing software (LIMS for Lasers) that altogether enables new and current LAS users to achieve and sustain long-term δ(2)H and δ(18)O accuracy and precision for these important isotopic assays.
激光吸收光谱（LAS）技术被越来越多地应用于水文和环境研究中，用于测量水样中的 δ(2)H 和 δ(18)O。尽管 LAS 仪器易于使用，但由于需要进行大量的离线数据处理，例如异常值检测、算法推导和应用以纠正样品间记忆、线性和非线性仪器漂移、VSMOW-SLAP 标度归一化，以及长期的 QA/QC 审核，将其纳入实验室操作并不容易。在这里，我们提出了一系列标准化的水同位素 LAS 性能测试和常规样品分析模板、推荐的程序指南，以及新的数据处理软件（LIMS for Lasers），这些都可以帮助新的和现有的 LAS 用户实现并维持这些重要同位素分析的长期 δ(2)H 和 δ(18)O 准确性和精密度。
