Spark source mass spectrometry (SSMS) is used for elemental analysis by the Process Measurements Branch of the United States Environmental Protection Agency's Industrial Environmental Research Laboratory as part of its phased approach to environmental source assessment. The source assessment is an evaluation of the physical, chemical, and biological characteristics of industrial process streams. The first phase, known as Level 1, is a screening phase which emphasizes completeness of detection of elements and classes of organic materials.
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