Spotlight on the Gulf Coast Conference - Analytical Instrumentation
Manufacturer of Devices for Generating Calibration Gas Standards and Purification
VICI Metronics, Inc. in Poulsbo, Washington is the leading manufacturer of devices and instruments for generating calibration gas standards. Gas standards are used for calibrating gas analyser systems, testing hazardous gas alarms, or conducting long- term studies of effects on materials or biological systems—in short, any situation requiring a stable concentration of a specific trace chemical. The Metronics product line includes Dynacal® permeation tubes and Dynacalibrator® calibration gas generators.
and G-Cal and G-Cal
Generating calibration gas standards with calibrators and perm tubes from VICI Metronics offers several advantages over relying on bottled calibration standards. Gas mixtures can be easily generated by using the appropriate combination of perm tubes, with hundreds of compounds available. This technique also allows the removal of a single component from a gas mixture by simply removing the appropriate perm tube. With a Dynacalibrator, a wide range of concentrations can be generated by varying the dilution flow rate and/or the temperature set point.
By contrast, bottled trace level standards (ppb and ppm) can be very expensive, and calibrations requiring multiple components over a wide range of concentrations require a large number of gas cylinders, which consume valuable lab space. Problems can also arise from degradation of the standard within the cylinder, from changes in cylinder pressure, and from interaction of calibration components and surfaces.
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Dynacal Perm Tubes with certified permeation rates traceable to NIST for precise results
VICI Metronics: masters of materials and design for chromatography grade gas purifiers
Gas purification is critical to GC performance. Several types of contaminants are detrimental - notably moisture, hydrocarbons, and oxygen. VICI Metronics gas purifier modules are designed to be placed in-line with the GC carrier or detector gas supply to remove these contaminants from the analytical gases prior to their entering the GC.
Original equipment in the Agilient® Mass Spec and LC Mass Spec, VICI Metronics gas purifiers dramatically reduce contaminant
levels and absorb a greater variety of contaminants than other gas purification products. Purification is optimised with a multiple bed format. Each bed functions at a lower contaminant concentration, resulting in a series of contaminant concentration gradients across the length of the gas purifier.
Advanced materials and design features guarantee that the modules will produce gases that are at least a factor of ten higher than a 99.9999% “chromatography grade” cylinder of gas when the purifier is supplied by a 99.995% cylinder.
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Dynacal permeation tubes, or “perm tubes”, are small, inert capsules containing a pure chemical compound in a two phase equilibrium between its gas phase and its liquid or solid phase. Held at a precise, constant temperature in the permeation chamber of a Dynacalibrator, the device emits the compound through its permeable portion at a constant rate. Permeation rates are certified using standards traceable to NIST by the most basic and accurate laboratory procedure-measuring the gravimetric weight loss over a known time at a known temperature.
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45857pr@reply-direct.com AUGUST / SEPTEMBER •
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