The mass-to-charge ratio (m/Q) is a physical quantity relating the mass (quantity of matter) and the electric charge of a given particle, expressed in...
16 KB (2,346 words) - 04:26, 3 November 2023
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...
82 KB (10,342 words) - 00:29, 17 April 2024
Time-of-flight mass spectrometry (TOFMS) is a method of mass spectrometry in which an ion's mass-to-charge ratio is determined by a time of flight measurement...
30 KB (3,944 words) - 05:53, 13 April 2024
A mass spectrum is a histogram plot of intensity vs. mass-to-charge ratio (m/z) in a chemical sample, usually acquired using an instrument called a mass...
12 KB (1,554 words) - 01:38, 4 March 2024
1909. Together with the mass-to-charge ratio, the electron mass was determined with reasonable precision. The value of mass that was found for the electron...
10 KB (1,482 words) - 23:48, 28 November 2023
Isotope-ratio mass spectrometry (IRMS) is a specialization of mass spectrometry, in which mass spectrometric methods are used to measure the relative abundance...
20 KB (2,548 words) - 01:53, 25 April 2024
J. J. Thomson (category Mass spectrometrists)
calculated must have bodies much smaller than atoms and a very large charge-to-mass ratio. Thomson is also credited with finding the first evidence for isotopes...
50 KB (5,069 words) - 22:19, 10 May 2024
quadrupole between the rods. Only ions of a certain mass-to-charge ratio will reach the detector for a given ratio of voltages: other ions have unstable trajectories...
11 KB (1,329 words) - 17:26, 27 December 2023
ions by their mass-to-charge ratio (often given as m/z or m/Q). Ions of a particular m/z-ratio coming from MS1 are selected and then made to split into smaller...
60 KB (7,332 words) - 04:34, 11 May 2024
Thomson (unit) (category Mass spectrometry)
infrequently in scientific literature relating to the field of mass spectrometry as a unit of mass-to-charge ratio. The unit was proposed by R. Graham Cooks...
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into ionized fragments and detecting these fragments using their mass-to-charge ratio. These two components, used together, allow a much finer degree of...
37 KB (4,761 words) - 13:54, 21 May 2024
that measures the mass-to-charge ratio of charged particles Rutherford backscattering spectrometry, an analytical technique used to determine the structure...
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sample. TIMS utilizes a magnetic sector mass analyzer to separate the ions based on their mass to charge ratio. The ions gain velocity by an electrical...
8 KB (1,058 words) - 17:26, 17 November 2023
possible fragment ions from the mass spectra. Mass spectra is a plot of relative abundance against mass-to-charge ratio. It is commonly used for the identification...
24 KB (2,827 words) - 18:35, 11 December 2023
Spectrum (physical sciences) (section Mass spectrum)
as energy in electron spectroscopy or mass-to-charge ratio in mass spectrometry. Spectrum is also used to refer to a graphical representation of the signal...
22 KB (2,729 words) - 18:37, 5 April 2024
Selected ion monitoring (category Mass spectrometry)
is a mass spectrometry scanning mode in which only a limited mass-to-charge ratio range is transmitted/detected by the instrument, as opposed to the full...
2 KB (225 words) - 04:58, 6 May 2024
within a mass tolerance window around a particular analyte's mass-to-charge ratio is plotted at every point in the analysis. The size of the mass tolerance...
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Time of flight (category Mass spectrometry)
depending on the mass-to-charge ratio. Thus the time-of-flight is used to measure velocity, from which the mass-to-charge ratio can be determined. The time-of-flight...
12 KB (2,048 words) - 12:09, 21 May 2024
cyclotron resonance mass spectrometry is a type of mass analyzer (or mass spectrometer) for determining the mass-to-charge ratio (m/z) of ions based on...
17 KB (2,196 words) - 18:39, 25 March 2024
analyzing ejected secondary ions. The mass/charge ratios of these secondary ions are measured with a mass spectrometer to determine the elemental, isotopic...
18 KB (2,248 words) - 17:22, 21 April 2024
method with time of flight mass spectrometry, ions evaporated by application of electric pulses can have their mass-to-charge ratio computed. Through successive...
32 KB (4,502 words) - 20:42, 16 May 2024
particles, and their charge was negative. Thomson called these particles "corpuscles". He measured their mass-to-charge ratio to be several orders of...
67 KB (8,832 words) - 20:43, 21 May 2024
gyromagnetic ratio is γ = q 2 m {\displaystyle \gamma ={\frac {q}{2m}}} where q {\displaystyle {q}} is its charge and m {\displaystyle {m}} is its mass. The derivation...
19 KB (2,360 words) - 22:19, 17 April 2024
number is a multiple of 1/3. quantum number mass-to-charge ratio oxidation ionization anion cation magnetic charge Dynamic Systems in Neuroscience by Izhikevich...
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way, the detergent provides all proteins with a uniform charge-to-mass ratio. By binding to the proteins the detergent destroys their secondary, tertiary...
36 KB (4,717 words) - 09:27, 31 January 2024
Collision-induced dissociation (redirect from Charge remote fragmentation)
be detected in the presence of other ions of the same m/z value (mass-to-charge ratio), reducing the background and increasing the limit of detection....
11 KB (1,347 words) - 09:38, 10 April 2024
Spectrometer (section Mass spectrometer)
sample by measuring the mass-to-charge ratio and abundance of gas-phase ions. The energy spectrum of particles of known mass can also be measured by determining...
8 KB (830 words) - 21:21, 21 January 2024
rates, determined largely by their mass when the charge-to-mass ratio (Z) of all species is uniform. However, when charges are not all uniform the electrical...
44 KB (5,057 words) - 12:44, 24 April 2024
mass-to-charge ratio of ions. The results are typically presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio....
253 KB (31,115 words) - 05:46, 12 May 2024
Isotope (redirect from Index to isotope pages)
by placing a photographic plate in their path, and computed their mass to charge ratio using a method that became known as the Thomson's parabola method...
47 KB (5,890 words) - 03:34, 20 May 2024