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Ion mobility spectrometry
Videos
Ion mobility spectrometry is a method of conducting analytical research that separates and identifies ionized molecules present in the gas phase based on the mobility of the molecules in a carrier buf
IMS chip at the U.S. Pacific Northwest National Laboratory: this dime-sized chip provides dozens of channels through which ions travel (perpendicular
IMS chip at the U.S. Pacific Northwest National Laboratory: this dime-sized chip provides dozens of channels through which ions travel (perpendicular to plane of view) to be separated and identified
Example of Aspiration IMS sensor.
Example of Aspiration IMS sensor.
Electrospray ionization
Videos
Electrospray ionization is a technique used in mass spectrometry to produce ions using an electrospray in which a high voltage is applied to a liquid to create an aerosol. It is especially useful in p
Ion mobility spectrometry
…2 + α 4 [ E N ] 4 + … ] . The molecules of the sample need to be ionized, usually by corona discharge, atmospheric pressure photoionization (APPI), electrospray ionization (ESI), or radioactive atmospheric-pressure chemical ionization (R-APCI) source, e.g. a small piece of 63Ni or 241Am, similar to the one used in ionization…
Electrospray (nanoSpray) ionization source
Electrospray (nanoSpray) ionization source
Diagram of electrospray ionization in positive mode: under high voltage, the Taylor cone emits a jet of liquid drops. The solvent from the droplets pr
Diagram of electrospray ionization in positive mode: under high voltage, the Taylor cone emits a jet of liquid drops. The solvent from the droplets progressively evaporates, leaving them more and more charged. When the charge exceeds the Rayleigh limit the droplet explosively dissociates, leaving a stream of charged (positive) ions
Fenn's first electrospray ionization source coupled to a single quadrupole mass spectrometer
Fenn's first electrospray ionization source coupled to a single quadrupole mass spectrometer
Diagram of a DESI ambient ionization source
Diagram of a DESI ambient ionization source