Forensic Science

Download Applications of Time-of-Flight and Orbitrap Mass by Sandra Perez, Peter Eichhorn, Damia Barcelo PDF

By Sandra Perez, Peter Eichhorn, Damia Barcelo

Applications of Time-of-Flight and Orbitrap Mass Spectrometry in Environmental, foodstuff, Doping, and Forensic Analysis bargains with using high-resolution mass spectrometry (MS) within the research of small natural molecules. over the last few years, time-of-flight (ToF) and Orbitrap MS have either skilled super development in a large number of analytical sectors and at the moment are good proven in lots of laboratories the place excessive necessities are put on analytical functionality.

This ebook provides a head-to-head comparability of those applied sciences that compete at once with one another. As clients with hands-on event in either strategies, the authors offer a balanced description of the strengths and weaknesses of either ideas. within the overwhelming majority of situations, ToF-MS and Orbitrap-MS were used for qualitative reasons, usually identity of discrete molecular entities reminiscent of drug metabolites or transformation items of environmental contaminants.

This paradigm is now altering as quantitative services are more and more being explored, as are non-target methods for independent broad-scope screening. In view of the continual innovation of high-resolution MS tool brands in designing and constructing extra strong machines, technological advances in either and software program are massive, with many novel functions.

This booklet summarizes and analyzes those traits. The compilation of chosen examples from different analytical fields will let the readers to find not just the potential for high-resolution MS of their region, but additionally indicates advances in different fields that depend on hi-res MS.

  • Provides finished assurance of functions of time-of-flight and orbitrap mass spectrometry in environmental, meals, doping, and forensic analysis
  • Explores quite a few really expert options, giving a balanced description of the strengths and weaknesses of each
  • Presents a normal evaluate of imaging thoughts inside analysis

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Extra resources for Applications of Time-of-Flight and Orbitrap Mass Spectrometry in Environmental, Food, Doping, and Forensic Analysis

Sample text

The longer flight path for ions with higher energy compensates for varying ion velocities resulting in coincident arrival times at the detector. Improvements to mirror design have come through the use of two stage mirrors, where the first stage has a higher potential gradient and the second stage can be adjusted independently. The result of this two stage mirror design makes it possible to compensate for a greater spread of ion energy from the ion pusher. In turn, this allows for a greater voltage to be applied across the pusher plates, thereby reducing ion turnaround time.

6). When a Q-TOF was configured with a dual ion funnel, and appropriate pumping, a significant increase in atmospheric sampling was achieved by substituting a single bore atmospheric sampling skimmer with a capillary containing six parallel bores, a hexabore capillary. The resulting increase in atmospheric sampling was shown to confirm that a linear relationship exists between the atmospheric pressure gas sampling rate and increase in ion sampling efficiency (Fig. 7). 30 SECTION j I Instrumentation FIGURE 6 Dual stage ion funnel design with off-axis geometry to improve signal to noise ratio.

I. Carroll, I. N. Stillwell, Anal. Chem. 45 (1973) 936e943. N. G. McKay, J. Am. Soc. Mass Spectrom. 16 (2005) 1730e1738. L. Go´mez-Pe´rez, P. Plaza-Bolan˜os, R. L. Martı´nez Vidal, A. Garrido Frenich, J. Am. Soc. Mass Spectrom. 25 (2014) 899e902. Agilent Technologies Introduces First-ever Electron Ionization GC/MS/MS System with Attogram-level Sensitivity, Agilent press release, 2014. com. A. W. McDaniel, Transport Properties of Ions in Gases, Wiley, New York, 1988. A. W. , Ann. Phys. 4 (1958) 233e270.

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