Silica gel, Tenax, and carbon media adsorption tube for the samp

Details Silica gel, Tenax, and carbon media adsorption tube for the samp Silica gel, Tenax, and carbon media adsorption tube for the samp

1994-10-20

1996-11-12

Noland, Thomas P.

Measuring and testing

Sampler, sample handling, etc.

With constituent separation

7386321, G01N 122

Patent

active

055742300

ABSTRACT:
An air sampling tube containing silica gel, Tenax, and carbon is used to sample air containing either unknown contaminants or a mixture of a wide variety of organic compounds, varying in boiling points, functionality and overall polarity. The sampling tube presented here, HAL1, is only one of several possible tube configurations utilizing a variety of adsorption materials in differing combinations, amounts, and different sampling devices or methods. HAL1 is prepared and assembled in a common configuration similar to the (EPA TO-1) configuration for thermal desorption and subsequent analysis by GC/MS. Thermal desorption eliminates solvent extractions and deposits the entire sample in the instrument for increased method sensitivity while eliminating solvent peak fronts from masking low level analytes which coelute. This sample collection tube will allow rapid collection and analysis of a wide variety of organic compounds, affording subsequent analysis by an appropriate analytical technique using commercially available thermal desorption tube sample introduction systems.

REFERENCES:
patent: 4040805 (1977-08-01), Nelms et al.
patent: 4180389 (1979-12-01), Paul
patent: 4698071 (1987-10-01), Elias
patent: 4759210 (1988-07-01), Wohltjen
patent: 4977095 (1990-12-01), Zaromb
patent: 5081871 (1992-01-01), Glaser
patent: 5137744 (1992-08-01), Cagley et al.
patent: 5370004 (1994-12-01), Bossart et al.

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