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.
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ILM 49.5 July
July 2024
Chromatography Articles - Understanding PFAS: Analysis and Implications Mass Spectrometry & Spectroscopy Articles - MS detection of Alzheimer’s blood-based biomarkers LIMS - Essent...
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