Abstract

The development of a center-grounded load coil in inductively coupled plasma-mass spectrometry (ICP-MS) has been reported to reduce greatly the so-called "secondary discharge" between the plasma and mass-spectrometer interface. Presumably, this secondary discharge results from a high floating ac potential in the plasma relative to the sampler or skimmer and can complicate attempts to optimize or characterize the ICP-MS instrument. With the center-grounded load-coil configuration, each half of the load coil attempts to couple into the plasma a potential of opposite polarity; however, because of the relatively high conductivity of the discharge, the net voltage remains near zero. Although several workers have explored alternative load-coil geometries in an effort to achieve the same ends, the center-grounded load-coil configuration is simple and effective.

PDF Article

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription