Ads
related to: mass spectrometer instrument
Search results
Results From The WOW.Com Content Network
Ion mobility spectrometry-mass spectrometry (IMS/MS or IMMS) is a technique where ions are first separated by drift time through some neutral gas under an applied electrical potential gradient before being introduced into a mass spectrometer. [43] Drift time is a measure of the collisional cross section relative to the charge of the ion.
The sector instrument geometry consists of a 127.30° () electric sector without an initial drift length followed by a 60° magnetic sector with the same direction of curvature. Sometimes called a "Bainbridge mass spectrometer," this configuration is often used to determine isotopic masses.
Example of a GC–MS instrument. Gas chromatography–mass spectrometry (GC–MS) is an analytical method that combines the features of gas-chromatography and mass spectrometry to identify different substances within a test sample. [1]
This is in contrast to other forms of inorganic mass spectrometry; Glow Discharge Mass Spectrometry (GDMS) and Thermal Ionization Mass Spectrometry (TIMS), that require a two-stage process: Insert sample(s) into a vacuum chamber, seal the vacuum chamber, pump down the vacuum, energize sample, thereby sending ions into the mass analyzer. With ...
For example, a sector instrument can be combined with a collision quadrupole and quadrupole mass analyzer to form a hybrid instrument. [7] A mass-selecting quadrupole and collision quadrupole with time-of-flight device as the second mass selection stage is a hybrid known as a quadrupole time-of-flight mass spectrometer (QTOF MS).
Sector instruments tend to surpass the TQMS in mass resolution and mass range. [3] However, the triple quadrupole has the advantage of being cheaper, easy to operate and highly efficient. [ 3 ] Also, when operated in the selected reaction monitoring mode, the TQMS has superior detection sensitivity as well as quantification. [ 3 ]
Ad
related to: mass spectrometer instrument