Measurement and Testing
Dynamic generation of trace gas standard mixtures of both SVOCs and oxygen-sensitive SVOCs at ppm(v/v) to sub-ppb(v/v) concentrations using Tracer Cert® diffusion tubes
Apr 12 2016 Read 3366 Times
Free to read
This article has been unlocked and is ready to read.
ISO 6145-8-2005 "Gas Analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 8: Diffusion method" shows designs of diffusion tubes/cells that are clearly very difficult to fill. Tracer Measurement Systems has developed a new design of uniquely identifiable, laser-engraved, refillable and re-useable diffusion tubes (see Journal of Environmental Monitoring, 2009, 11, 1543-4) which is much easier to fill and use than the design shown in ISO 6145-8-2005. This presentation shown at the 2015 PEFTEC conference is now available to download.
A novel method of use of these Tracer Cert® diffusion tubes at -21°C in a new Tracer Cert® Sub-ambient Thermostat™ for the dynamic generation of oxygen-sensitive VVOCs, isoprene and acetaldehyde, in an oxygen-free nitrogen carrier gas flow at ppb(v/v) concentrations is described and the results of the calibrations of the diffusion tubes are shown. This method can be widely applied to the dynamic generation of trace standards of oxygen-sensitive VVOCs in the ppm(v/v) to sub-ppb(v/v) concentration range.
In this edition Fuel for Thought - Changes on the Endress + Hauser Executive Board - Yokogawa signs strategic partnership and equity agreement with AlgaEnergy - NEFTEGAZ in Moscow provides...
View all digital editions
Jan 27 2019 Jeddah, Saudi Arabia
Jan 28 2019 Galveston, Tx, USA
Feb 02 2019 Washington, DC, USA.
Feb 04 2019 Port of Spain, Trinidad
Feb 05 2019 Paris La Defense, France