HYBRID CAPILLARY/PACKED TRAP AND METHOD OF USE
A hybrid trap including a replaceable open-tubular capillary trap followed by a packed trap is used to collect, preconcentrate, and recover a sample, such as VOCs and SVOCs found in air. The capillary stage prevents losses and carryover of the heavy fraction and can also collect the particles in air...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | A hybrid trap including a replaceable open-tubular capillary trap followed by a packed trap is used to collect, preconcentrate, and recover a sample, such as VOCs and SVOCs found in air. The capillary stage prevents losses and carryover of the heavy fraction and can also collect the particles in air that contain the heavier SVOCs, also preventing them from reaching the packed stage. The packed stage traps lighter organic compounds that are not as prone to carryover due to channeling. The ionic species within the collected VOCs and SVOCs at the capillary trap can be converted to volatile compounds that allow gas chromatography-mass spectrometry. |
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