Generator meets parts per trillion gas standards.

Press Release Summary:




Model 491M/B/SD blends precisely known gas standards with parts-per-trillion (ppt) analyte concentrations. System uses 2 independent stages of dilution to achieve ppt concentrations, allowing standards to be created from analyte flow rates above 10 ml/min with total dilution gas flow of less than 20 l/min. System can make additions to the dilution gas to compensate for unknown contamination. Permeation tubes are available for 400+ compounds.



Original Press Release:



Generator for Parts-Per-Trillion Gas Standards



The 491M/B/SD Gas Standards Generator dynamically blends precisely known gas standards with parts-per-trillion (ppt) analyte concentrations. The system uses two stages of dilution to achieve ppt concentrations. The first stage combines the emission of analyte vapor from a Trace Source(TM) permeation tube with a precisely known flow of pure dilution gas to form a parts-per-billion concentration primary mixture. In the second stage an aliquot of the primary mixture is further diluted to form the ppt mixture. Suitable permeation tubes are available for over 400 compounds.

The 491M/B/SD circumvents several common problems with ppt standards. First, for most compounds, ppt and even ppb gas standards are not stable in storage due to reactions and adsorption by the container. With direct blending methods the key problems are measuring the analyte flow and obtaining true "zero gas" for use as diluent. By using two independent stages of dilution the 491M/B/SD allow ppt standards to be created from analyte flow rates above 10 ml/min with total dilution gas flow less than 20 l/min. To insure accuracy in spite of significant contamination of the dilution gas the system can make "standard additions" to the dilution gas to allow compensation for unknown contamination.

For more information contact KIN-TEK Laboratories, Inc., 504 Laurel, La Marque, TX 77568, Phone: (800) 326-3627 or (409) 938-3627, Fax: (409) 938-3710, wwvw.kin-tek.com, email: sales@kin-tek.com

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