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Environmental Technology Listing
Title of Listing:
ASIST-150 Series Headspace&Purge&Trap Autosamplers
Category:
Characterization Technologies
Subcategory:
*Air, Water, Waste, Soil, All Listings
Media:
Soil, Soil Gas, Water, Air Vapors, Solid, Sludge
Contaminants:
Halogenated and Non-Halogenated Volatiles and Semi-Volatiles, BTEX, Solvents, Pesticides/Herbicides
Web Site:
Email:
HEADSPACE@cybergate.net
Technology Description:

ASIST, Inc. is a manufacturer of small portable instruments that incorporate all the power of contemporary headspace technology and has a number of advantageous features.

          The main distinction of this design is the near horizontal position of vials in the heated zone. This dramatically increases the surface area of evaporation and shortens the equilibration times. Moreover, the horizontal positioning provides for rotation of vials on heating. It forms a thin film of sample on the walls of the vial providing very large surface area and the efficiency of rotary evaporators (very important for viscous samples).

          The horizontal position of the vials also helped with miniaturization of the instrument. Indeed, this 50 vial autosampler measures only 9"x14"x15". It can be top-mounted on a GC injection port or connected via a heated transfer line (100 vials capacity option is available).

          The Headspace-Trap option (Model ASIST-150HST) permits the injection of all vapor volume and increases the sensitivity of the analyses (~x10).

          The Headspace-Purge + Trap option (Model ASIST-150PT) provides the capability for both prescreening (Static Headspace) and Analysis (Purge + Trap) with the same instrument and the same GC.

          The Headspace-Air sampling option (Model ASIST-200A) permits preconcentration thermal desorption of gaseous samples (Air) using a variety of traps (similar to ASIST-150HST).
Performance Status/
Limitations:

          1. Temperature: The equilibration temperatures for regular units are limited to 200 degrees C .

          2. Sample capacity: Maximum 170 vials capacity autosamplers available at this time.

          3. Vial size: Regular units are using regular EPA-vials (25 mL). The special orders can be taken for 40 mL vials.

          4. Range of GC's: The units fit on any GC with vertical injection ports. The GC's with horizontal injection port require heated transfer line option.
Topics
Analytical Testing, Technologies, Characterization
Additional Topics/Tags/Keywords
Headspace, Purge and Trap, Autosampler


Organization:
ASIST
Address:
5405 Schaaf Road
Phone:
DescriptionNumber
City:
Cleveland
1.
Primary (216) 642-8515
State/Province/Territory:
OH
2.
Zip/Postal Code:
44131
3.
Country:
United States
4.
Fax:(216) 642-9700
Branch Locations: