Charge inversion mass spectrum: Difference between revisions
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Charge inversion processes of the types: M<sup>+</sup> + X<sup>?????????????????????-</sup>, M - + X<sup>2+</sup> or M - + X <sup>?????????????????????-</sup> M<sup>+</sup> + X + 2e respectively, occurring in a [[collision cell]] (containing a gas X) located in a [[field-free zone]] preceding a magnetic and electric sector combination placed in either order, may be detected as follows: if the instrument slits are wide and if the connections to the two sectors, appropriate to transmission of either positive or negative main-beam ions, are simply reversed, the negative or positive product ions respectively will be transmitted. If the magnetic field is scanned a spectrum of such ions will be obtained and this is termed a charge-inversion spectrum. These are sometimes referred to as -E and +E spectra. Note: The terms ??????????????????????2E, E /2,-E or +E mass spectrum????????????????????????? should not be used without prior explanation of their meaning. | Charge inversion processes of the types: M<sup>+</sup> + X<sup>?????????????????????-</sup>, M - + X<sup>2+</sup> or M - + X <sup>?????????????????????-</sup> M<sup>+</sup> + X + 2e respectively, occurring in a [[collision cell]] (containing a gas X) located in a [[field-free zone]] preceding a magnetic and electric sector combination placed in either order, may be detected as follows: if the instrument slits are wide and if the connections to the two sectors, appropriate to transmission of either positive or negative main-beam ions, are simply reversed, the negative or positive product ions respectively will be transmitted. If the magnetic field is scanned a spectrum of such ions will be obtained and this is termed a charge-inversion spectrum. These are sometimes referred to as -E and +E spectra. Note: The terms ??????????????????????2E, E /2,-E or +E mass spectrum????????????????????????? should not be used without prior explanation of their meaning. | ||
Revision as of 23:05, 13 July 2009
| DRAFT DEFINITION |
| Charge inversion mass spectrum |
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The measurement of the relative abundance of ions that result from a charge inversion reaction as a function of m/z. |
| Considered between 2004 and 2006 but not included in the 2006 PAC submission |
| This is an unofficial draft definition presented for information and comment. |
Orange Book entry
Orange Book
| ORANGE BOOK DEFINITION
IUPAC. Analytical Division. Compendium of Analytical Nomenclature (the Orange Book). Definitive Rules, 1979 (see also Orange Book 2023) |
| Charge inversion mass spectrum |
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|
Charge inversion processes of the types: M+ + X?????????????????????-, M - + X2+ or M - + X ?????????????????????- M+ + X + 2e respectively, occurring in a collision cell (containing a gas X) located in a field-free zone preceding a magnetic and electric sector combination placed in either order, may be detected as follows: if the instrument slits are wide and if the connections to the two sectors, appropriate to transmission of either positive or negative main-beam ions, are simply reversed, the negative or positive product ions respectively will be transmitted. If the magnetic field is scanned a spectrum of such ions will be obtained and this is termed a charge-inversion spectrum. These are sometimes referred to as -E and +E spectra. Note: The terms ??????????????????????2E, E /2,-E or +E mass spectrum????????????????????????? should not be used without prior explanation of their meaning. |
| IUPAC 1997 Orange Book Chapter 12 |
| Index of Orange Book Terms |
