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Through the Looking Glass and What Cavity Ringdown Found There

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Cavity ringdown spectroscopy promises to find atmospheric pollutants with ease and accuracy.

Sze M. Tan, Edward H. Wahl, Alexander Kachanov and Barbara Paldus, Picarro Inc.

What is air? Scientists worldwide continue to focus their attention and their instruments on answering that simple question with an ever-increasing standard for accuracy. It is no longer sufficient to know that air is composed mostly of nitrogen and oxygen. We need to know in detail about all the trace gases found in the air, the tens of parts per billion of ammonia, the several parts per million of methane and the 370 ppm of carbon dioxide. We must be able to identify and measure the hundreds of trace gas compounds that exist in the air we breathe, some at parts per trillion or even lower...Read full article

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    Published: October 2004
    ammoniacarbon dioxideCommunicationsFeaturesgasesindustrialmethaneMicroscopynitrogenoxygenSensors & Detectorsspectroscopy

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