High-precision measurements of δ2H, δ18O and δ17O in water with the aid of cavity ring-down laser spectroscopy

Pierchała, Anna; Różański, Kazimierz; Duliński, Marek; Gorczyca, Zbigniew; Marzec, Michał; Czub, Robert

doi:10.1080/10256016.2019.1609959

Cited by 31 publications

(60 citation statements)

References 22 publications

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“…Long runs of the Andes‐2020, Mainz‐2020, MIX‐2020 and VSMOW‐2 waters – covering a range typical for most natural samples and measured on a background of Mainz Milli‐Q water – all give internal precisions below 0.05‰ for δ 18 O values and 0.17‰ for δ 2 H values. The precisions, based on single sample injections, are comparable with the precisions of pooled injection data reported for Picarro L2140‐i analyzers in standard operating mode 15,16 and generally better than for IRMS systems 8 . If we pool the data from our study per four consecutive injections to make a better comparison with data from pooled injections in standard operation mode, the 1 σ uncertainties of the long runs of the Andes‐2020, Mainz‐2020, MIX‐2020 and VSMOW‐2 waters are between 0.01‰ and 0.02‰ for δ 18 O values and 0.05‰ and 0.12‰ for δ 2 H values.…”

Section: Discussionsupporting

confidence: 74%

“…Analyzers and analytical schemes have improved rapidly since extensive development started about 10 years ago 13,14 . Currently, methodologies employed for the analysis of water samples using IRIS systems typically rely on repetitive analysis of samples to bring the precisions of the pooled data down to 0.04‰ for δ 18 O values and 0.1‰ for δ 2 H values 15,16 …”

Section: Introductionmentioning

confidence: 99%

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Isotope ratio infrared spectroscopy analysis of water samples without memory effects

Graaf

Vonhof

Levy

et al. 2021

Rapid Comm Mass Spectrometry

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Rationale Since their introduction more than a decade ago, isotope ratio infrared spectroscopy (IRIS) systems have rapidly become the standard for oxygen (δ18O) and hydrogen (δ2H) isotope analysis of water samples. An important disadvantage of IRIS systems is the well‐documented sample‐to‐sample memory effect, which requires each sample to be analyzed multiple times before the desired accuracy is reached, lengthening analysis times and driving up the costs of analyses. Methods We present an adapted set‐up and calculation protocol for fully automated analysis of water samples using a Picarro L2140‐i cavity ring‐down spectroscopy instrument. The adaptation removes memory effects by use of a continuously moisturized nitrogen carrier gas. Water samples of 0.5 μL are measured on top of the water vapor background, after which isotope ratios are calculated by subtraction of the background from the sample peaks. Results With this new technique, single injections of water samples have internal precisions (1σ) below 0.05‰ for δ18O values and 0.1‰ for δ2H values, regardless of the isotope ratio of the previous sample. Precision is worse, however, when the isotope difference between the sample and background water is too large (i.e., exceeding approximately 9‰ for δ18O values and 70‰ for δ2H values). Isotope ratios show negligible drift across the four weeks within which the experiments were performed. The single‐injection 1σ precision for 17O excess (Δ′17O) determined with this method is 60 per meg. Conclusions Our experiments demonstrate that by removing sample‐to‐sample memory effects with a moisturized carrier gas, the time for measurement of δ18O and δ2H values using an IRIS system can be reduced markedly without compromising the analytical precision and accuracy. Thorough replication is needed to achieve sufficiently low uncertainties for Δ′17O.

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Section: Discussionsupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Isotope ratio infrared spectroscopy analysis of water samples without memory effects

Graaf

Vonhof

Levy

et al. 2021

Rapid Comm Mass Spectrometry

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“…(one sigma level), whereas δ 2 H and δ 18 O values determined using IRMS technique have overall uncertainties in the order of 1.0‰ and 0.1‰, respectively. The uncertainties of δ 2 H and δ 18 O analyses using laser spectroscopy are substantially lower: approximately 0.18‰ and 0.037‰ for δ 2 H and δ 18 O, respectively (Pierchala et al 2019).…”

Section: Methodsmentioning

confidence: 89%

“…Since 2017, precipitation samples are also analysed using cavity ring-down laser spectrometry. Picarro L2140-i CRDS analyser is employed for this purpose (Pierchala et al 2019).…”

Section: Methodsmentioning

confidence: 99%

Isotopic composition of precipitation in Poland: a 44-year record

et al. 2019

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Isotopic composition of precipitation (2 H /1 H and 18 O/ 16 O isotope ratios, tritium content) is nowadays widely used in numerous applications of environmental isotopes-most notably in hydrology, climatology and biogeochemistry. Here we present a long record (44 years) of stable isotope composition and tritium content in monthly precipitation available for the Krakow station (southern Poland). Krakow is the only site in Poland for which long-term record of the isotopic composition of monthly precipitation is available. The tritium data are discussed here in the context of generally declining levels of bomb tritium in the global atmosphere and growing influence of technogenic emissions of this isotope. Two aspects of temporal variability of stable isotope composition of precipitation collected in Krakow are discussed here: (i) seasonality and (ii) interannual changes of δ 18 O and δ 2 H signal. Whereas the seasonality of stable isotope signal is generated mainly by seasonally varying the degree of rainout of air masses bringing moisture from the source regions (subtropical Atlantic Ocean) to the centre of the European continent, the North Atlantic Oscillation seems to govern interannual changes of δ 18 O and δ 2 H on the decadal timescale. Progressing warming of the local atmosphere, in the order of 1.8 °C in the past four decades, leaves its imprint in stable isotope signal measured in Krakow precipitation; the slope of isotope-temperature relationship is in the order of 0.50‰/°C for δ 18 O and 3.5‰/°C for δ 2 H.

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“…δ 18 17 O excess values (Δ 17 O) are given in per meg (10 -6 ) calculated using a regression line after Luz et al [32]. Here we considered uncertainties for d-values better than 1 ‰ and those of Δ 17 O values better than 20 per meg derived for a quality check sample measured continuously and similar to those given in [33]. High contents of dissolved organic carbon (DOC) can be problematic for laser measurements because of potential interference with the used water absorption bands.…”

Section: Methodsmentioning

confidence: 99%

Evaporation loss along the Calueque-Oshakati Canal in the Cuvelai-Etosha Basin (Northern Namibia): evidence from stable isotopes and hydrochemistry

Koeniger

Hamutoko

Post

et al. 2020

Isotopes in Environmental and Health Studies

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Since 1973, Kunene River water has been carried from the Calueque reservoir in Angola along a 160 km open concrete canal to the town of Oshakati in the central part of the Cuvelai-Etosha Basin and has been supplying drinking water to the most densely populated rural area of Namibia. Despite its importance for the region, intraseasonal water quality and the technical condition of the canal are not routinely checked. Water samples were collected during four field campaigns right before the onset of the rainy season (November 2013 and 2014), and after the rainy season (June 2014 and May 2015), at 16 sites along the canal for stable water isotopes (deuterium, oxygen-17 and oxygen-18) and hydrochemical analyses. The isotope patterns and chemical composition of the canal water is discussed in comparison to local rain, Kunene source water, surface water and groundwater. Clear isotope enrichment indicates evaporative loss of water. A Craig-Gordon model was used to estimate water loss. The loss increases with distance from the source with a maximum of up to 10 %, depending on the season. The results are discussed in context of water availability, vulnerability and water resources management in this water-scarce area.

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High-precision measurements of δ²H, δ¹⁸O and δ¹⁷O in water with the aid of cavity ring-down laser spectroscopy

Cited by 31 publications

References 22 publications

Isotope ratio infrared spectroscopy analysis of water samples without memory effects

Isotope ratio infrared spectroscopy analysis of water samples without memory effects

Isotopic composition of precipitation in Poland: a 44-year record

Evaporation loss along the Calueque-Oshakati Canal in the Cuvelai-Etosha Basin (Northern Namibia): evidence from stable isotopes and hydrochemistry

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