scholarly journals Simple and rapid characterization of mycolic acids from Dietzia strains by using MALDI spiral-TOFMS with ultra high mass-resolving power

2013 ◽  
Vol 66 (12) ◽  
pp. 713-717 ◽  
Author(s):  
Kanae Teramoto ◽  
Tomohiko Tamura ◽  
Satoshi Hanada ◽  
Takafumi Sato ◽  
Hiroko Kawasaki ◽  
...  
Keyword(s):  
Resolving Power ◽  
High Mass ◽  
Mycolic Acids ◽  
Mass Resolving Power ◽  
Rapid Characterization

Calculation of the Ion Optical Properties of Inhomogeneous Magnetic Sector Fields Part 3: Oblique Incidence and Exit at Curved Boundaries

1959 ◽  
Vol 14 (9) ◽  
pp. 822-827 ◽  
Author(s):  
H. A. Tasman ◽  
A. J. H. Boerboom ◽  
H. Wachsmuth
Keyword(s):  
Oblique Incidence ◽  
Normal Incidence ◽  
Second Order ◽  
Resolving Power ◽  
High Mass ◽  
Curved Boundaries ◽  
Magnetic Sector ◽  
Mass Resolving Power ◽  
Mass Dispersion ◽  
Fringing Fields

In previous papers 1.2we presented the radial second order imaging properties of inhomogeneous magnetic sector fields with normal incidence and exit at plane boundaries. These fields may provide very high mass resolving power and mass dispersion without increase in radius or decrease of slit widths. In the present paper the calculations are extended to include the effect of oblique incidence and exit at curved boundaries. The influence of the fringing fields on axial focusing when the boundaries are oblique, is accounted for. It is shown that the second order angular aberration may Le eliminated by appropriate curvature of the boundaries.

scholarly journals High mass accuracy and high mass resolving power FT-ICR secondary ion mass spectrometry for biological tissue imaging

2013 ◽  
Vol 405 (18) ◽  
pp. 6069-6076 ◽  
Author(s):  
Donald F. Smith ◽  
Andras Kiss ◽  
Franklin E. Leach ◽  
Errol W. Robinson ◽  
Ljiljana Paša-Tolić ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Secondary Ion Mass Spectrometry ◽  
Mass Accuracy ◽  
Resolving Power ◽  
Tissue Imaging ◽  
High Mass ◽  
High Mass Accuracy ◽  
Mass Resolving Power ◽  
Secondary Ion ◽  
Ft Icr

Time-of-flight mass spectrographs of high mass resolving power

2019 ◽  
Vol 34 (36) ◽  
pp. 1942001
Author(s):  
H. Wollnik ◽  
M. Wada ◽  
P. Schury ◽  
M. Rosenbusch ◽  
Y. Ito ◽  
...  
Keyword(s):  
Time Of Flight ◽  
Molecular Ions ◽  
Resolving Power ◽  
High Mass ◽  
Energetic Ions ◽  
Structure Of Molecules ◽  
Mass Resolving Power ◽  
Sum Formula ◽  
The Masses

The masses of charged atoms and molecules were first investigated by laterally dispersive sector field mass analyzers, which early on already achieved high mass resolving powers. Equally, high mass resolving powers were achieved by time-of-flight mass analyzers during the last decades. These measurements became possible when fast and precise electronic circuitries became available. Such techniques have been developed and used extensively for the mass analysis of short-lived nuclei, whose mass values reveal insight in processes that describe the formation of elements in star explosions. Precise mass determinations of short-lived ions have been performed for energetic ions in large accelerator storage rings as well as for low-energy ions in time-of-flight mass spectrographs with long flight paths. Similarly, precise mass measurements can also be performed for molecular ions that help to reveal the structure of molecules. In case of very high mass resolving powers, the mass determination of molecular ions can be so high that the measured ion mass directly reveals the molecule’s sum formula.

Simultaneous Hydrogen and Heavier Element Isotopic Ratio Images with a Scanning Submicron Ion Probe and Mass Resolved Polyatomic Ions

2014 ◽  
Vol 20 (2) ◽  
pp. 577-581 ◽  
Author(s):  
Georges Slodzian ◽  
Ting-Di Wu ◽  
Noémie Bardin ◽  
Jean Duprat ◽  
Cécile Engrand ◽  
...  
Keyword(s):  
Secondary Ion Mass Spectrometry ◽  
Isotopic Ratio ◽  
Simultaneous Recording ◽  
Mass Resolution ◽  
Resolving Power ◽  
High Mass ◽  
Ratio Measurement ◽  
Ion Probe ◽  
Secondary Ions ◽  
Mass Resolving Power

AbstractIn situ microanalysis of solid samples is often performed using secondary ion mass spectrometry (SIMS) with a submicron ion probe. The destructive nature of the method makes it mandatory to prevent information loss by using instruments combining efficient collection of secondary ions and a mass spectrometer with parallel detection capabilities. The NanoSIMS meets those requirements with a magnetic spectrometer but its mass selectivity has to be improved for accessing opportunities expected from polyatomic secondary ions. We show here that it is possible to perform D/H ratio measurement images using 12CD−/12CH−, 16OD−/16OH−, or 12C2D−/12C2H− ratios. These polyatomic species allow simultaneous recording of D/H ratios and isotopic compositions of heavier elements like 15N/14N (via 12C15N−/12C14N−) and they provide a powerful tool to select the phase of interest (e.g., mineral versus organics). We present high mass resolution spectra and an example of isotopic imaging where D/H ratios were obtained via the 12C2D−/12C2H− ratio with 12C2D− free from neighboring mass interferences. Using an advanced mass resolution protocol, a “conventional” mass resolving power of 25,000 can be achieved. Those results open many perspectives for isotopic imaging at a fine scale in biology, material science, geochemistry, and cosmochemistry.

scholarly journals The 3D OrbiSIMS—label-free metabolic imaging with subcellular lateral resolution and high mass-resolving power

2017 ◽  
Vol 14 (12) ◽  
pp. 1175-1183 ◽  
Author(s):  
Melissa K Passarelli ◽  
Alexander Pirkl ◽  
Rudolf Moellers ◽  
Dmitry Grinfeld ◽  
Felix Kollmer ◽  
...  
Keyword(s):  
Resolving Power ◽  
Lateral Resolution ◽  
High Mass ◽  
Metabolic Imaging ◽  
Label Free ◽  
Mass Resolving Power

scholarly journals C60 Secondary Ion FT-ICR Mass Spectrometry: High Mass Resolving Power and High Mass Accuracy SIMS

2013 ◽  
Vol 19 (S2) ◽  
pp. 660-661
Author(s):  
L. Pasa-Tolic ◽  
D.F. Smith ◽  
F.E. Leach ◽  
E.W. Robinson ◽  
R.M. Heeren
Keyword(s):  
Mass Spectrometry ◽  
Mass Accuracy ◽  
Resolving Power ◽  
High Mass ◽  
High Mass Accuracy ◽  
Mass Resolving Power ◽  
Secondary Ion ◽  
Ft Icr

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

scholarly journals First eddy covariance flux measurements by PTR-TOF

2010 ◽  
Vol 3 (2) ◽  
pp. 387-395 ◽  
Author(s):  
M. Müller ◽  
M. Graus ◽  
T. M. Ruuskanen ◽  
R. Schnitzhofer ◽  
I. Bamberger ◽  
...  
Keyword(s):  
Eddy Covariance ◽  
Mass Spectra ◽  
Resolving Power ◽  
High Mass ◽  
High Time Resolution ◽  
Exact Mass ◽  
Eddy Covariance Method ◽  
Grass Land ◽  
Mass Resolving Power ◽  
Flux Measurements

Abstract. The recently developed PTR-TOF instrument was evaluated to measure methanol fluxes emitted from grass land using the eddy covariance method. The high time resolution of the PTR-TOF allowed storing full mass spectra up to m/z 315 with a frequency of 10 Hz. Three isobaric ions were found at a nominal mass of m/z 33 due to the high mass resolving power of the PTR-TOF. Only one of the three peaks contributed to eddy covariance fluxes. The exact mass of this peak agrees well with the exact mass of protonated methanol (m/z 33.0335). The eddy covariance methanol fluxes measured with PTR-TOF were compared to virtual disjunct eddy covariance methanol fluxes simultaneously measured with a conventional PTR-MS. The methanol fluxes from both instruments show excellent agreement.

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