Study on the characteristics of quadrupole mass spectrometer by the UHV partial pressure standard

Dong, Meng; Sun, W.; Wu, Chengyao; Feng, Tianyou; Zhao, Lihua; Zhang, Huzhong; Chen, Lian; Peng, Xiaoqiang; Ren, Zhengyi; Cheng, Yongjun

doi:10.1016/j.vacuum.2021.110357

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…With a signal gain of around 3 decades, this allows for trace detection and distinction from background noise in the first place. However, especially in newly installed SEMs, such as the one used for this study, aging and degradation lead to a decrease in ion current and SEM gain over time, which can be roughly adjusted for by spectrometer bake‐out and applying a higher voltage [93–95] . Since both H 2 and CO 2 signals are also amplified by the SEM, their calibration sensitivity, i. e. the slope of their calibration curves, is known, and a relative comparison can be made between the slopes of each gas for various measurements.…”

Section: Resultsmentioning

confidence: 99%

“…However, especially in newly installed SEMs, such as the one used for this study, aging and degradation lead to a decrease in ion current and SEM gain over time, which can be roughly adjusted for by spectrometer bake-out and applying a higher voltage. [93][94][95] Since both H 2 and CO 2 signals are also amplified by the SEM, their calibration sensitivity, i. e. the slope of their calibration curves, is known, and a relative comparison can be made between the slopes of each gas for various measurements. The (CN) 2 signal is then normalized between measurements by this relative factor, as detailed in Figure S2a and b, Table S3 (Supporting Information), and the literature.…”

Section: Initial Gassing Measurements and Considerationsmentioning

confidence: 99%

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Elucidating Gas Evolution of Prussian White Cathodes for Sodium‐ion Battery Application: The Effect of Electrolyte and Moisture

Dreyer,

Maddar,

Kondrakov

et al. 2024

Batteries & Supercaps

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As global energy storage demand increases, sodium‐ion batteries are often considered as an alternative to lithium‐ion batteries. Hexacyanoferrate cathodes, commonly referred to as Prussian blue analogues (PBAs), are of particular interest due their low‐cost synthesis and promising electrochemical response. However, because they consist of ~50 wt% cyanide anions, a possible release of highly toxic cyanide gases poses a significant safety risk. Previously, we observed the evolution of (CN)2 during cycling via differential electrochemical mass spectrometry (DEMS), but were unable to determine a root cause or mechanism. In this work, we present a systematical investigation of the gas evolution of Prussian white (PW) with different water content via DEMS. While H2 is the main gas detected, especially in hydrated PW and during overcharge (4.6 V vs. Na+/Na), the evolution of CO2 and (CN)2 depends on the electrolyte conductive salt. The use of oxidative NaClO4 instead of NaPF6 is the leading cause for the formation of (CN)2. Mass spectrometric evidence of trace amounts of HCN is also found, but to a much lower extent than (CN)2, which is the dominant safety risk when using NaClO4‐containing electrolyte. Despite being a good model salt, it is not a viable option for commercial applications.

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Section: Resultsmentioning

confidence: 99%

Section: Initial Gassing Measurements and Considerationsmentioning

confidence: 99%

Elucidating Gas Evolution of Prussian White Cathodes for Sodium‐ion Battery Application: The Effect of Electrolyte and Moisture

Dreyer,

Maddar,

Kondrakov

et al. 2024

Batteries & Supercaps

View full text Add to dashboard Cite

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Calibration study for quadrupole mass spectrometer with LIP new UHV partial pressure standard

Dong¹,

Sun²,

Wu³

et al. 2021

Measurement: Sensors

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A study of the gas interference effects in quadrupole mass spectrometer

Dong¹,

Wenjun²,

Cheng³

et al. 2022

Meas. Sci. Technol.

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In most applications, it is significant to understand how the composition and total pressure of the gas affects the sensitivity of mass spectrometer for a specific composition of the gas. This work reported on the interference effects of QMG700 quadrupole mass spectrometer (QMS) with use of the ultrahigh vacuum (UHV) partial pressure standard apparatus and standard leaks. Six combinations for Ar-H2, Ar-He, N2-H2, He-H2, He-N2 and CH4-N2-Ar-He-H2 gas mixtures were selected for the study of the instrument-gas interaction. The partial pressures of the interference gases varied in the range of 2.2×10-7 Pa to 8.3×10-3 Pa and the total pressures of the calibration chamber ranged from 1.2×10-5 Pa to 9.9×10-3 Pa. The detector of the QMS utilized only Faraday cup (FC), and the results demonstrated that the sensitivity of the trace gas was significantly affected by the interfering gas when the total pressure exceeded about 10-5 Pa. This study was also performed according to the ISO TS 20175: 2018.

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Study on the characteristics of quadrupole mass spectrometer by the UHV partial pressure standard

Cited by 3 publications

References 24 publications

Elucidating Gas Evolution of Prussian White Cathodes for Sodium‐ion Battery Application: The Effect of Electrolyte and Moisture

Elucidating Gas Evolution of Prussian White Cathodes for Sodium‐ion Battery Application: The Effect of Electrolyte and Moisture

Calibration study for quadrupole mass spectrometer with LIP new UHV partial pressure standard

A study of the gas interference effects in quadrupole mass spectrometer

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