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Triple-isotope calibration of in-house water standards supplemented by determination of 17O content of USGS49-50 reference materials using cavity ring-down laser spectrometry
Isotopes in Environmental and Health Studies ( IF 1.3 ) Pub Date : 2021-01-29 , DOI: 10.1080/10256016.2021.1875222
Anna Pierchala 1 , Kazimierz Rozanski 1 , Marek Dulinski 1 , Zbigniew Gorczyca 1 , Robert Czub 1
Affiliation  

ABSTRACT

The procedure of calibrating in-house water standards suitable for routine analyses of triple-isotope composition of water samples using Picarro L2140-i CRDS analyser is presented and discussed. Such standards are indispensable for achieving and maintaining high quality of isotope analyses of water in terms of their precision and accuracy. A set of seven different water standards consisting of three in-house standards and four secondary standards commercially available was calibrated against VSMOW2/SLAP2 primary reference materials. The calibrated standards cover a wide range of isotopic composition, with δ values ranging from close to zero to the values comparable with SLAP2. The apparent consistency of the calibrated values of δ2H, δ18O and d-excess with corresponding certified values for commercially available USGS47-50 standards and the consistency of the calibrated values of δ17O and Δ17O with its literature values for USGS47-48 standards confirm the high quality of the performed calibration. Moreover, the calibration exercise allowed to obtain δ17O and Δ17O values for USGS49 and USGS50 standards, not reported so far.



中文翻译:

内部水标准的三同位素校准,并使用腔衰荡激光光谱法测定USGS49-50参考材料中的17O含量

摘要

介绍并讨论了使用Picarro L2140- i CRDS分析仪校准适用于常规分析水样品中三同位素组成的内部水标准的程序。就其同位素精度和准确性而言,此类标准对于实现和维持高质量的水同位素分析必不可少。针对VSMOW2 / SLAP2主要参考材料,对一组七个不同的水标准进行了校准,其中包括三个内部标准和四个市售的二级标准。校准的标样涵盖了广泛的同位素组成,δ值范围从接近零到可与SLAP2相当的值。的校准值的表观一致性δ 2 H,δ 18 O和d建筑不动产与市售USGS47-50标准对应的认证值和校准值的一致性δ 17 O和Δ 17 ö以其文献值为USGS47-48标准确认执行的校准的高品质。此外,校准锻炼允许获得δ 17 O和Δ 17个O值的USGS49和USGS50标准,至今没有报道。

更新日期:2021-01-29
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