Sampling device for determining wood species using rapid...

Details Sampling device for determining wood species using rapid... Sampling device for determining wood species using rapid...

G - Physics

01

N

G01N 33/46 (2006.01) G01N 30/72 (2006.01)

Patent

CA 2097269

ABSTRACT OF THE DISCLOSURE A sampling device rapidly desorbs organic compounds from a wood surface using a laser desorption cell. The device may be used with an ion mobility spectrometer to produce an ion drift time signature which can be used to determine wood species. Wood pieces are conveyed on a conveyor and a laser desorption cell is placed adjacent to a surface of the wood. A laser beam is projected onto the wood surface through the laser desorption cell in a series of pulsed emissions, and permits the identification to be made as wood pieces are moving on a conveyor. A high energy beam such as a laser is projected onto a sample in a series of pulsed emissions, the time of each emission is controlled, the pause between emissions is controlled, the number of emissions per series is controlled and the energy per emission is controlled to ensure temperature increase of the sample is sufficient to desorb a vapor and the vapor is heated sufficiently for analysis in the ion mobility spectrometer.

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