Trace Analysis in End-Exhaled Air Using Direct Solvent Extraction in Gas Sampling Tubes: Tetrachloroethene in Workers as an Example

<table>Sketch of the lower side of a gas sampling tube in the vertical position: the exhaled breath extract (the isooctane phase) is located within the cylindrical hole.</table>

International Journal of Analytical Chemistry

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Figure 4

Figure 4: Trace Analysis in End-Exhaled Air Using Direct Solvent Extraction in Gas Sampling Tubes: Tetrachloroethene in Workers as an Example 