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The establishment of EVISA is funded by the EU through the Fifth Framework Programme (G7RT- CT- 2002- 05112).

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mass bias

Mass bias is the deviation of measured isotope ratios by a mass spectrometer from the "true value", due to mass discrimination that occurs in all mass spectrometers. In particular, several factors have been found to affect bias in ICP-MS, such as detector "dead time", the electrostatic ion focussing lens and the "space charge" effect occuring at the interface region. Compared with conventional ICP-MS, the hexapole ICP-MS hass high mass bias at low mass region, but lower mass bias at higher mass.

The term "mass bias" was found in the following pages:


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