Direct Analysis in Real Time
Direct analysis in real time (DART) is an atmospheric pressure ion source that operates by exposing the sample to a gas stream (typically helium or nitrogen) that contains long-lived electronically or excited neutral atoms, vibronically excited molecules (or "metastables"). Excited states are formed in a glow discharge in a chamber through which the gas flows.
Read more about this topic: Ambient Ionization
Famous quotes containing the words direct, analysis, real and/or time:
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—Walter Lippmann (1889–1974)
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—Anonymous Parent. As quoted in Women of a Certain Age, by Lillian B. Rubin, ch. 2 (1979)