Magnetic and Electric Sector Instruments

Similar to Grimm type DC source Pump down in 10 s 

The novel ion optic consists of a curved ESA (not to be confused with the ESA in the mass spectrometer), an Einzel lens and a quadrupole doublet. The ESA separates ions of a defined kinetic energy, which have been extracted by a prefilter, from neutrals, particles, and photons. The ions are 

This enables the use of a flat surfaced array detector. No scanning is required, resulting in a fully simultaneous determination of all the elements (5-240 amu) and fully utilizing the continuous ion beam produced by the ICP. Because the entire spectrum is recorded at once, it is possible to go back and retrieve concentration data for any element in any sample at anytime. 

The major disadvantage of double-focusing MS systems for elemental analysis is their high cost compared to quadrupole-based systems. 

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