Volatile organic compound monitoring by photo acoustic radiometry

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Two methods for sampling and analyzing volatile organics in subsurface pore gas were developed for use at the Hazardous Waste Disposal Site at Los Alamos National Laboratory. One is Thermal Desorption Gas Chromatography Mass Spectrometry (TDGCMS), the other is Photoacoustic Radiometry (PAR). Presented here are two years worth of experience and lessons learned as both techniques matured. The sampling technique is equally as important as the analysis method. PAR is a nondispersive infrared technique utilizing band pass filters in the region from 1 to 15 {mu}m. A commercial instrument, the Model 1302 Multigas Analyzer, made by Bruel and Kjaer, was ... continued below

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6 p.

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Sollid, J.E.; Trujillo, V.L.; Limback, S.P. & Woloshun, K.A. December 1, 1995.

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Description

Two methods for sampling and analyzing volatile organics in subsurface pore gas were developed for use at the Hazardous Waste Disposal Site at Los Alamos National Laboratory. One is Thermal Desorption Gas Chromatography Mass Spectrometry (TDGCMS), the other is Photoacoustic Radiometry (PAR). Presented here are two years worth of experience and lessons learned as both techniques matured. The sampling technique is equally as important as the analysis method. PAR is a nondispersive infrared technique utilizing band pass filters in the region from 1 to 15 {mu}m. A commercial instrument, the Model 1302 Multigas Analyzer, made by Bruel and Kjaer, was adapted for field use. To use the PAR there must be some a priori knowledge of the constellation of analytes to be measured. The TDGCMS method is sensitive to 50 analytes. Hence TDGCMS is used in an initial survey of the site to determine what compounds are present and at what concentration. Once the major constituents of the soil-gas vapor plume are known the PAR can be configured to monitor for the five analytes of most interest. The PAR can analyse a sample in minutes, while in the field. The PAR is also quite precise in controlled situations.

Physical Description

6 p.

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INIS; OSTI as DE96002589

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  • Society of Photo-Optical Instrumentation Engineers (SPIE) meeting on environmental monitoring, San Francisco, CA (United States), 25-28 Sep 1995

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  • Other: DE96002589
  • Report No.: LA-UR--95-3644
  • Report No.: CONF-9509111--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 137294
  • Archival Resource Key: ark:/67531/metadc623885

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 29, 2016, 12:43 p.m.

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Sollid, J.E.; Trujillo, V.L.; Limback, S.P. & Woloshun, K.A. Volatile organic compound monitoring by photo acoustic radiometry, article, December 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc623885/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.