Thermal desorption mass spectrometer for mass metrology

Silvestri, Zaccaria; Azouigui, S.; Bouhtiyya, S.; Macé, Stéphane; Plimmer, Mark; Pinot, P.; Tayeb-Chandoul, F.; Hannachi, Riadh

doi:10.1063/1.4870921

Cited by 9 publications

(7 citation statements)

References 25 publications

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“…The current results lead to conclusions similar to those by Silvestri et al [102] in their TDS-GU study of iridium mass standards. They found that water constituted the major component of the spectra obtained after the samples were cleaned following the recommended procedure [103] and then exposed to the laboratory atmosphere.…”

Section: Accepted Manuscriptsupporting

confidence: 91%

Determination of the equivalent hydrogen fugacity during electrochemical charging of 3.5NiCrMoV steel

Venezuela

Tapia-Bastidas

Zhou³

et al. 2018

Corrosion Science

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Highlights  A new thermal desorption spectroscopy (TDS) apparatus was used to study hydrogen in a 3.5NiCrMoV steel  The hydrogen concentration increased with increasingly negative charging potential and increasing hydrogen gas pressures.  The equivalent hydrogen fugacity versus charging overpotential relationship was derived.  A two-site model for Sieverts' Law explained the positive Y-intercept, as the density of already filled hydrogen traps.

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Section: Accepted Manuscriptsupporting

confidence: 91%

Determination of the equivalent hydrogen fugacity during electrochemical charging of 3.5NiCrMoV steel

Venezuela

Tapia-Bastidas

Zhou³

et al. 2018

Corrosion Science

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“…Silvestri et al [42] determined the water desorption activation energy E D for pure iridium after BIPM cleaning, exposure to air for 10 d and finally, thermal desorption under vacuum (heating ramp of 50 °C • min −1 from ambient temperature up to 600 °C). They found a value E D of 0.43 eV with a standard uncertainty of 0.02 eV.…”

Section: Study Of the New Materials: Iridium And Udimet 720mentioning

confidence: 99%

Present and future mass standards for the LNE watt balance and the future dissemination of the mass unit in France

Pinot¹,

Beaudoux²,

Bentouati³

et al. 2016

Metrologia

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The value of the Planck constant h was determined in 2014 by means of the LNE watt balance experiment. The relative standard uncertainty was 31 parts in 10 8 . This first determination was performed in air with a 500 g mass standard made from XSH Alacrite. The main uncertainty components in air associated with the mass involve the calibration, the mass stability, the buoyancy correction and the magnetic interaction correction. The combined relative uncertainty due to the mass is 7.2 parts in 10 8 . The use in 2016 of a mass standard made from platinum iridium alloy significantly reduces the component of uncertainty arising from the mass standard for a Planck constant measurement either in air or under vacuum. The relative uncertainty due to this contribution is estimated to be about 3 parts in 10 8 in air and one part in 10 8 under vacuum. The future system for the dissemination of the mass unit using the LNE watt balance will be based on a primary realization with three 500 g mass standards made from platinum-iridium alloy, pure iridium and Udimet 720 respectively, coupled with a pool of kilograms made from different materials. Pure iridium and Udimet 720 are new materials to make reference mass standards proposed by CNAM and LNE respectively and have never been used by any NMI for manufacturing mass standards until now. Some new results concerning their surface behavior are given.

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“…toluene, cyclohexane, and dichloromethane). TDS is a method used to observe how molecules and atoms bound to the surface of materials are released from the surface as the surface temperature increases, and is used to evaluate material design, surface contamination, and manufacturing processes [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of solvent releases from microfluidic devices made of cycloolefin polymer by temperature-desorption mass spectrometry

Takahashi

Mune

Yamamuro

et al. 2023

J. Micromech. Microeng.

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Microfluidic devices have been used in various biological experiments. The working temperature of the devices spans a wide range (approximately 23–95 °C). Among thermoplastic materials, cycloolefin polymers (COP) are promising materials for microfluidic devices. This is because COP can overcome the well-known disadvantages of polydimethylsiloxane, a commonly used material, and have the advantage of better observability than polystyrene and polymethyl methacrylate. However, most COP-based devices are fabricated using solvents and adhesives during the bonding process. These solvents, which are known to affect biological experiments, may remain in the device and be released during the experiments. It is necessary to investigate whether solvents are actually released and, if so, how they are released. Here we introduce thermal desorption spectroscopy (TDS) as a simple and quantitative method to observe solvent release from solvent-bonded and vacuum ultraviolet (VUV)-bonded products. Solvents are released from the solvent-bonded product at 31.5 °C, suggesting that it may have negative effects on various biological experiments. On the other hand, the VUV-bonded product releases solvents (cyclohexane and toluene), which are used during olefin polymerization in the synthesis process of COP, at temperatures above 84 °C. Therefore, the experiments conduct below 84 °C (e.g., in situ hybridization, reverse transcription and loop-mediated isothermal amplification) were not affected. In addition, the amount of solvent released above 84 °C is small (1/548 to 1/913 of the solvent-bound product), so it is expected that the extent of the effect on experiments conducted above 84 °C (reverse transcription and polymerase chain reaction) is small, if there is any. We conclude that solvent-bound devices can have undesirable effects in many biological applications, not just cell culture. We believe that evaluating solvent release from devices is important for the development of new devices in the future.

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Thermal desorption mass spectrometer for mass metrology

Cited by 9 publications

References 25 publications

Determination of the equivalent hydrogen fugacity during electrochemical charging of 3.5NiCrMoV steel

Determination of the equivalent hydrogen fugacity during electrochemical charging of 3.5NiCrMoV steel

Present and future mass standards for the LNE watt balance and the future dissemination of the mass unit in France

Evaluation of solvent releases from microfluidic devices made of cycloolefin polymer by temperature-desorption mass spectrometry

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