Handbook of Mass Spectra of Environmental Contaminants, Second Edition is a collection of the electron impact mass spectra of 533 commonly encountered environmental pollutants. The compounds were selected from an analysis of several U.S. Environmental Protection Agency and World Health Organization databases. All data have been reviewed by a panel of experienced mass spectrometrists. To help identify unknown compounds, all spectra have been indexed by common chemical name, CAS registry number, exact molecular weight, and intense peaks. Completely revised and expanded, the Handbook of Mass Spectra of Environmental Contaminants, Second Edition, provides information essential to environmental laboratory specialists world-wide. This handbook is a collection of the electron impact mass spectra of 533 commonly encountered environmental pollutants, selected from U.S. Environmental Protection Agency and World Health Organization databases.