Plasma source mass spectrometry is a versatile analytical technique. This work offers a description of the design and operation of reaction cells for ICP-MS. Acting as a reference for the development of analytical methods in a number of diverse applications, the book covers subjects including the dynamics of the plasma resulting from the introduction of aerosol droplets; the theory and operation of reaction and collisioin cells; ion transport through the ion optics; hyphenation methods; and the results of analyses, including that of paleoanthropological samples and platinum group elements in the environment.