Laboratory products
Generator for Parts-per-trillion Gas Standards
Dec 20 2005
The 491M/B/SDcircumvents 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 nl/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.
Digital Edition
ILM Guide 2025/26
June 2025
Buyers' Guide Listings- Product Listings by Category- Suppliers Listings (A-Z)Chromatography Articles- Setting the power coefficient and the baseline to linearise the signal of the evaporative ligh...
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