Appearance potential measurements by mass spectrometry. A physical chemistry experiment

Fass, Richard A.; Kendall, Steven G.

doi:10.1021/ed048p545

Cited by 2 publications

(3 citation statements)

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“…) and then calculation of their heats of formation. 110 Also, in the field of physical chemistry, Gal et al have described an experiment concerning the fundamental issue of analyte properties under ESI conditions, namely gas-phase basicity. 111 Under ESI + condition, besides the protonation of analysed molecules (formation [M + H] + ions), the cationization of the analysed molecules is also very common, usually we deal with [M + Na] + ions.…”

Section: The Other Kinds Of Mass Spectrometry Experimentsmentioning

confidence: 99%

“…Fass and Kendall have described EI mass spectrometric experiments that can be incorporated into the physical chemistry curriculum, which concerned the fundamental issues, namely, measurements of ionization potential of gas ions (CH 4 /CH 4 +● and CH 3 ● /CH 3 + ) and then calculation of their heats of formation. 110 Also, in the field of physical chemistry, Gal et al have described an experiment concerning the fundamental issue of analyte properties under ESI conditions, namely gas-phase basicity. 111 Under ESI + condition, besides the protonation of analysed molecules (formation [M + H] + ions), the cationization of the analysed molecules is also very common, usually we deal with [M + Na] + ions.…”

Section: The Other Kinds Of Mass Spectrometry Experimentsmentioning

confidence: 99%

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Teaching mass spectrometry: A compilation of approaches to teaching theory and practice of mass spectrometry

Frański

2024

Eur J Mass Spectrom (Chichester)

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The areas of mass spectrometry applications seem to be much larger than those of any other analytical techniques. They extend from the determination of molecular mass in organic chemistry, through the analytical applications in forensic, environmental and omics sciences, the application in extra-terrestrial exploration and many others. Mass spectrometry, usually coupled with chromatographic techniques, has also found wide application in the pharmaceutical industry, forensic laboratories, laboratories of sanitary inspection or environmental inspection, etc. The growing areas of applications give rise to the demand for the comprehensive mass spectrometry education of undergraduates. This overview covers the body of literature describing various interesting ideas that can be successfully used for teaching mass spectrometry. Since mass spectrometry is a multidisciplinary field, old but dynamically developing, teaching mass spectrometry may be more problematic in comparison to teaching other analytical techniques, for example, there is the problem of position of mass spectrometry in the chemistry curriculum. On the other hand, it is obvious that the mass spectrometry community, besides difficult scientific work, does great and admirable teaching work, in order to perfectly educate undergraduates in the field of mass spectrometry and to make learning mass spectrometry as attractive as possible.

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Section: The Other Kinds Of Mass Spectrometry Experimentsmentioning

confidence: 99%

Section: The Other Kinds Of Mass Spectrometry Experimentsmentioning

confidence: 99%

Teaching mass spectrometry: A compilation of approaches to teaching theory and practice of mass spectrometry

Frański

2024

Eur J Mass Spectrom (Chichester)

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“…Funding from the Engineering and Physical Sciences 59 Research Council, UK, (EP/I018093/1), synchrotron beamtime from Diamond Light Source (SI 9118) and…”

Section: Acknowledgementsmentioning

confidence: 99%

Thin film structural analysis using variable-period x-ray standing waves

et al. 2018

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Variable period X-ray standing wave (VPXSW) studies have been carried out using 3 keV X-rays and photoelectron detection. Two model surfaces have been used, a native SiO 2 layer (20 Å thick) on bulk silicon, and a purpose built multilayer surface comprising a chloroform/water marker layer (12 Å thick) on an ionic liquid spacer layer (211 Å thick) deposited on a SiO 2 /Si substrate at 90 K. By using photoelectron detection, both chemical and elemental sensitivity were achieved. The surfaces were modelled using dynamic X-ray scattering for X-ray intensity, and attenuation of photoelectrons transmitted through the layers, to produce simulations which accurately reproduced the experimental VPXSW measurements. VPXSW measurements made using the substrate, spacer layer and marker layer photoelectron signatures produced consistent structural values. This work demonstrates that VPXSW can be used to determine chemically specific layer thicknesses within thick (≲ 300 Å) surface structures composed of the light elements B, C, N, O, F and Cl with an accuracy of 10 to 15 Å, perpendicular to the surface.

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Appearance potential measurements by mass spectrometry. A physical chemistry experiment

Abstract: This paper describes an experiment used in a physical chemistry laboratory course, designed to introduce junior or senior students to the mass spectrometer.

Cited by 2 publications

References 1 publication

Teaching mass spectrometry: A compilation of approaches to teaching theory and practice of mass spectrometry

Teaching mass spectrometry: A compilation of approaches to teaching theory and practice of mass spectrometry

Thin film structural analysis using variable-period x-ray standing waves

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