Szczegóły publikacji
Opis bibliograficzny
High-precision measurements of $\delta^{2}H, \delta^{18}O$ and $\delta^{17}O$ in water with the aid of cavity ring-down laser spectroscopy / Anna PIERCHAŁA, Kazimierz RÓŻAŃSKI, Marek DULIŃSKI, Zbigniew GORCZYCA, Michał MARZEC, Robert CZUB // Isotopes in Environmental and Health Studies ; ISSN 1025-6016. — 2019 — vol. 55 iss. 3, s. 290-307. — Bibliogr. s. 305-307, Abstr. — Publikacja dostępna online od: 2019-04-30
Autorzy (6)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 122466 |
|---|---|
| Data dodania do BaDAP | 2019-07-29 |
| Tekst źródłowy | URL |
| DOI | 10.1080/10256016.2019.1609959 |
| Rok publikacji | 2019 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Isotopes in Environmental and Health Studies |
Abstract
A thorough evaluation of measurement uncertainty together with control of short-term and long-term precision of measurements should be a basis of any successful quality assurance/quality control (QA/QC) strategy aimed at maintaining a high quality of the analytical process. Here we present the results of a comprehensive assessment of the analytical performance of a Picarro L2140-i CRDS laser spectrometer analysing delta H-2, delta O-18 and delta O-17 in water. The assessment is based on results obtained during 15 months of continuous operation of this instrument (February 2017 to May 2018). The short-term precision of measured and derived quantities was 0.11, 0.036, 0.028, 0.23 parts per thousand and 11 per meg, for delta H-2, delta O-18, delta O-17, d-excess and Delta O-17, respectively, and is comparable to the precision reported by the manufacturer. The long-term precision of the L2140-i, defined as standard uncertainty of the time series of 153 analyses of a laboratory standard conducted throughout 15 months, was roughly two times lower (0.24, 0.053, 0.038, 0.37 parts per thousand and 21 per meg, for delta H-2, delta O-18, delta O-17, d-excess and Delta O-17). In-depth assessment of the measurement uncertainty of a single analysis revealed that assigned uncertainty of the calibration standards is an important component of the uncertainty budget, especially in case of delta H-2 analysis.
