文档介绍：ATOMIC MASS SPECTROMETRY / Inductively Coupled Plasma 229
ATOMIC MASS SPECTROMETRY
Contents
Inductively Coupled Plasma
Laser Microprobe
and, in the recent past, sample introduction systems,
Inductively Coupled Plasma radiofrequency (RF) generators, and works
were often the same for ICP-MS and ICP-atomic
E H Evans, University of Plymouth, Plymouth, UK emission spectrometry systems, though more special-
ization has recently been introduced.
& 2005, Elsevier Ltd. All Rights Reserved.
Instrumentation
Introduction The Inductively Coupled Plasma
Inductively coupled plasma mass spectrometry (ICP- The ICP is generated by coupling the energy from a
MS) is bination of two established techniques, RF generator into a suitable gas via a ic field
namely the inductively coupled plasma (ICP) and that is induced through a two or three turn, water-
mass spectrometry (MS). The ICP is an extremely cooled copper coil. The RF energy is normally
suitable ion source for anic MS because: supplied at a frequency of MHz, delivering
forward power at between 500 and 2000 W. Two gas
* the high temperature of the ICP ensures almost flows, usually argon, flow in a tangential manner
complete position of the sample into its through the outer tubes of a concentric, three-tube
constituent atoms and quartz torch that is placed axially in the copper coil.
* conditions within the IC