Книга: Ujjwal Sahoo,A. K. Sen and A. K. Seth «Mass Spectrometry»
Производитель: "LAP Lambert Academic Publishing" Mass Spectrometry is a technique that determines the molecular weight (mass) and elemental composition of a compound accurately. It records relative abundance (number of different kinds of ions) and mass/charge (m/e) ratio. An advantage of Mass Spectrometry is its ability to identify the unknown compounds using only pictogram (10-12) amounts. Because ions are very reactive and short-lived, their formation and manipulation must be conducted in a vacuum. Atmospheric pressure is around 760 torr (mm of mercury). The pressure under which ions may be handled is roughly 10-5 to 10-8 torr (less than a billionth of an atmosphere). ISBN:9783659179334 Издательство: "LAP Lambert Academic Publishing" (2012)
ISBN: 9783659179334 |
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См. также в других словарях:
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mass spectrometry — n an instrumental method for identifying the chemical constitution of a substance by means of the separation of gaseous ions according to their differing mass and charge called also mass spectroscopy mass spectrometric adj mass spectrometrically… … Medical dictionary
mass spectrometry — or mass spectroscopy Analytic technique by which chemical substances are identified by sorting gaseous ions by mass using electric and magnetic fields. A mass spectrometer uses electrical means to detect the sorted ions, while a mass spectrograph … Universalium
mass spectrometry — noun or mass spectroscopy : the use of the mass spectrometer • mass spectrometric adjective * * * mass spectrometry noun • • • Main Entry: ↑mass * * * … Useful english dictionary