Publication

Method for recording ion-cyclotron-resonance mass spectra and mass spectrometer designed for carrying out the method

Geoffrey Bodenhausen
1989
Patents

Abstract

Methods and spectrometers for carrying out ion-cyclotron-resonance spectrometry are described in which a pulse sequence is employed which is described by P1-t1-P2-Tm-P3-t2, (P1, P2, and P3 are radio-frequency pulses, with P1 and P2 having the same frequency; t1 and Tm are time intervals between the pulses; and t2 is the observation time following the last pulse); the sequence is repeated several times while varying t1 to obtain a plurality of induction signals during t2, from which a 2-dimensional spectrum may be derived by transformation from the time to the frequency domain. The transformation may be accomplished by 2-dimensional Fourier transformation or by the method of max. entropy. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/c25b7103-1310-4fdb-9e71-0587095adcbb

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Geoffrey Bodenhausen
1989
Patents

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c25b7103-1310-4fdb-9e71-0587095adcbb

About this result

Related concepts (32)

Mass spectrometry

Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio. Mass spectrometry is used in many different fields and is applied to pure samples as well as complex mixtures. A mass spectrum is a type of plot of the ion signal as a function of the mass-to-charge ratio.

Time–frequency analysis

In signal processing, time–frequency analysis comprises those techniques that study a signal in both the time and frequency domains simultaneously, using various time–frequency representations. Rather than viewing a 1-dimensional signal (a function, real or complex-valued, whose domain is the real line) and some transform (another function whose domain is the real line, obtained from the original via some transform), time–frequency analysis studies a two-dimensional signal – a function whose domain is the two-dimensional real plane, obtained from the signal via a time–frequency transform.

Ion-mobility spectrometry–mass spectrometry

Ion mobility spectrometry–mass spectrometry (IMS-MS) is an analytical chemistry method that separates gas phase ions based on their interaction with a collision gas and their masses. In the first step, the ions are separated according to their mobility through a buffer gas on a millisecond timescale using an ion mobility spectrometer. The separated ions are then introduced into a mass analyzer in a second step where their mass-to-charge ratios can be determined on a microsecond timescale.

Related publications (21)

Method for recording ion-cyclotron-resonance mass spectra and mass spectrometer designed for carrying out the method

Chat with Graph Search

Dynamics of the Fast-ion Acceleration in Type-i Elmy H-mode Scenarios on the Tcv Tokamak

Spatial propagation of movement-related basal ganglia activity predicts parkinsonian motor state

Recovering Communities in Structured Random Graphs