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The three principal components of Sandia's micro chem lab for gas-phase detection and analysis are small enough to fit easily inside a snow-pea pod. The left-most component is the surface acoustic wave sensor array, the lab's detection mechanism. The center one is a preconcentrator that absorbs or adsorbs chemical vapors. The right one that looks like a tiny CD is a miniature gas chromatograph column. Together they can collect, concentrate, and analyze a chemical sample weighing less than a single bacterium
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