Amperometric sensor for nanomolar nitrous oxide analysis

Damgaard, Lars Riis; Kelly, Colette; Casciotti, Karen L.; Ward, Bess B.; Revsbech, Niels Peter

doi:10.1016/j.aca.2019.12.019

Cited by 11 publications

(11 citation statements)

References 16 publications

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“…At several stations along this transect, N 2 O concentrations observed in the near-surface maximum exceeded 200 nM, higher than previous measurements in the region (Yamagishi et al, 2007;Babbin et al, 2015, Figure 2) S7; see the supporting information for a description of the N 2 O flux calculation). We rule out measurement uncertainty as the cause for this difference, on the basis of close agreement between our data and measurements by an in situ electrochemical N 2 O sensor (Damgaard et al, 2020); and close agreement between data produced by this lab and previous measurements at 16°N, 107°W (Babbin et al, 2015;Yamagishi et al, 2007) near our station PS2 (Figure 3).…”

Section: Spatiotemporal Variability Of N 2 O Cycling In the Etnp Odzsupporting

confidence: 86%

Quantifying Nitrous Oxide Cycling Regimes in the Eastern Tropical North Pacific Ocean With Isotopomer Analysis

Kelly

Travis

Baya

et al. 2021

Global Biogeochemical Cycles

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Nitrous oxide (N2O), a potent greenhouse gas, is produced disproportionately in marine oxygen deficient zones (ODZs). To quantify spatiotemporal variation in N2O cycling in an ODZ, we analyzed N2O concentration and isotopologues along a transect through the eastern tropical North Pacific (ETNP). At several stations along this transect, N2O concentrations reached a near surface maximum that exceeded prior measurements in this region, of up to 226.1 ± 20.5 nM at the coast. Above the σθ = 25.0 kg/m3 isopycnal, Keeling plot analysis revealed two sources to the near‐surface N2O maximum, with different δ15N2Oα and δ15N2Oβ values, but each with a site preference (SP) of 6‰–8‰. Given expected SPs for nitrification and denitrification, each of these sources could be comprised of 17%–26% nitrification (bacterial or archeal), and 74%–83% denitrification (or nitrifier‐denitrification). Below the σθ = 25.0 kg/m3 isopycnal, box model analysis indicated that the observed 46‰–50‰ SPs in the anoxic core of the ODZ cannot be reproduced in a steady state context without an SP for N2O production by denitrification, and may indicate instead a transient net consumption of N2O. Furthermore, time‐dependent model results indicated that while δ15N2Oα and δ18O‐N2O reflect both N2O production and consumption in the anoxic core of the ODZ, δ15N2Oβ predominantly reflects N2O sources. Finally, we infer that the high (N2O) observed at some stations derive from a set of conditions supporting high rates of N2O production that have not been previously encountered in this region.

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Section: Spatiotemporal Variability Of N 2 O Cycling In the Etnp Odzsupporting

confidence: 86%

Quantifying Nitrous Oxide Cycling Regimes in the Eastern Tropical North Pacific Ocean With Isotopomer Analysis

Kelly

Travis

Baya

et al. 2021

Global Biogeochemical Cycles

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“…Damgaard et al came up with a clever method to resolve this problem. 50 Instead of only diphenylphosphine for the O 2 removal in the front compartment, they integrated a switchable indium cathode that had the same material as the sensing cathode in the second compartment. The front cathode was periodically switched on to reduce the influx of N 2 O and only allow a small fraction of N 2 O to diffuse to the sensing cathode.…”

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confidence: 99%

Nitrous Oxide Is No Laughing Matter: A Historical Review of Nitrous Oxide Gas-Sensing Capabilities Highlighting the Need for Further Exploration

Milam-Guerrero

Yang

et al. 2022

ACS Sens.

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Nitrous oxide (N 2 O), also known as laughing gas, is arguably one of the most detrimental greenhouse gases while concurrently being overlooked by the public. Specifically, N 2 O is ∼300 times more damaging than its better-known counterpart carbon dioxide (CO 2 ) and has a longer-lived lifetime in the atmosphere than CO 2 . There exist both natural and anthropogenic sources of N 2 O, and thus, for a better understanding of sources, capture, and decomposition, it is pivotal to identify N 2 O within the nitrogen biosphere. This review covers the past and current low-cost N 2 O gas-sensing technologies, focusing specifically on low-cost metal oxide semiconductors (MOSs), chemiresistive and electrochemical sensors that can provide spatial and temporal monitoring of N 2 O emissions from various sources. Additionally, compositional modifications to MOsS using metal− organic frameworks (MOFs) are discussed, potentially facilitating new awareness and efforts for increased sensing performance and functionality in N 2 O detection.

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“…However, there are several other methods available for the detection of N 2 O such as chromatography [235], optical methods [236], laser absorption spectroscopy [237], photoacoustic spectroscopy [238] and amperometric microsensor [239]. Ryu et al [240] used a GS-electron capture detector (GC-ECD) for the determination for N 2 O of different concentrations in ancient-air-trapped ice cores.…”

Section: Metal Oxide Semiconductor-based Nitrous Oxide Gas Sensorsmentioning

confidence: 99%

“…Electrochemical amperometric sensors have the main advantages of gas detection because of their good sensitivity, simplicity, ease of use and low cost of device construction [245]. Some new methods like amperometric biosensors [239] and optical fibres [246] are still developing for N 2 O detection. There are a number of analytical techniques other than MOS-based sensors for the detection of N 2 O and each technique has its own advantage and disadvantage.…”

Section: Metal Oxide Semiconductor-based Nitrous Oxide Gas Sensorsmentioning

confidence: 99%

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Nanostructured metal oxide semiconductor-based sensors for greenhouse gas detection: progress and challenges

Gautam¹,

Sharma²,

Tyagi³

et al. 2021

R. Soc. open sci.

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Climate change and global warming have been two massive concerns for the scientific community during the last few decades. Anthropogenic emissions of greenhouse gases (GHGs) have greatly amplified the level of greenhouse gases in the Earth's atmosphere which results in the gradual heating of the atmosphere. The precise measurement and reliable quantification of GHGs emission in the environment are of the utmost priority for the study of climate change. The detection of GHGs such as carbon dioxide, methane, nitrous oxide and ozone is the first and foremost step in finding the solution to manage and reduce the concentration of these gases in the Earth's atmosphere. The nanostructured metal oxide semiconductor (NMOS) based technologies for sensing GHGs emission have been found most reliable and accurate. Owing to their fascinating structural and morphological properties metal oxide semiconductors become an important class of materials for GHGs emission sensing technology. In this review article, the current concentration of GHGs in the Earth's environment, dominant sources of anthropogenic emissions of these gases and consequently their possible impacts on human life have been described briefly. Further, the different available technologies for GHG sensors along with their principle of operation have been largely discussed. The advantages and disadvantages of each sensor technology have also been highlighted. In particular, this article presents a comprehensive study on the development of various NMOS-based GHGs sensors and their performance analysis in order to establish a strong detection technology for the anthropogenic GHGs. In the last, the scope for improved sensitivity, selectivity and response time for these sensors, their future trends and outlook for researchers are suggested in the conclusion of this article.

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Amperometric sensor for nanomolar nitrous oxide analysis

Cited by 11 publications

References 16 publications

Quantifying Nitrous Oxide Cycling Regimes in the Eastern Tropical North Pacific Ocean With Isotopomer Analysis

Quantifying Nitrous Oxide Cycling Regimes in the Eastern Tropical North Pacific Ocean With Isotopomer Analysis

Nitrous Oxide Is No Laughing Matter: A Historical Review of Nitrous Oxide Gas-Sensing Capabilities Highlighting the Need for Further Exploration

Nanostructured metal oxide semiconductor-based sensors for greenhouse gas detection: progress and challenges

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