measurement: GC-MS

What is GC - MS

GC: gas chromatography, high-performance liquid chromatography and ion chromatography

Simply put, the GC separates each component of a mixture and the Mass Spectrometer identifies each component and tells you the percentage of each one.

"In the simplest terms the GC/MS instrument represents a device that separates chemical mixtures (the GC component) and a very sensitive detector (the MS component) with a data collector the computer component). Once the sample solution is introduced into the GC inlet it is vaporized immediately because of the high temperature (250 degrees C) and swept onto the column by the carrier gas (usually Helium). The sample flows through the column experiencing the normal separation processes. As the various sample components emerge from the column opening, they flow into the capillary column interface. This device is the connection between the GC column and the MS. Some interfaces are separators and concentrate the sample via removal of the helium carrier. " - http://poohbah.cem.msu.edu/courses/CEM924JA/Cao_Ping/GC_MS_Interface/home.htm

More info on GC-MS

Analytical Chemistry is a vital tool for research on sustainable energy , determination of emissions of installations and the development of new measurement techniques for energy related problems like greenhouse gases.

1960's - Invention of Gas Chromatography and Atomic Absorption spectrophotometer make trace analysis possible and reasonably easy. Analysis of ppm and ppb levels of metals and organics in the environment begins. 1970's - Invention of liquid chromatography and the common use of mass spectrometry for analytical chemistry begins. 1980's - Continued strides in trace analysis and in identification of trace components through interfaced (hyphenated) methods eggs-MS, LC-MS, GC-IR, etc. (introduction_to_analytical_chemi)

Tidbits

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GC Reference library by Agilent Technologies

Downloadable SPME Literature by Supelco.

NIOSH- National Institute for Occupational Safety and Health

"conducting research and making recommendations for the prevention of work-related injury and illness". part of CDC--Centers for Disease Control and Prevention.. Also at here




NIST 02 - NIST/EPA/NIH Mass Spectral Library, and NIST MS Search Program for Windows

"a fully evaluated collection of electron impact (EI) mass spectra" of approximately 130,000 spectra of over 108,000 different compounds.




Supelco GC/MS, SPME products

"research, manufacture, and supply chromatography columns and related tools for environmental, government, food and beverage, pharmaceutical, biotechnology, medical, and chemical laboratories"




Varian inc

"builds tools and solutions for applications in life science and industry. for Scientific Instruments, Vacuum Technologies, and Electronics Manufacturing" and including the GC/MS lines.

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A laboratory technique for investigation of diffusion and transformation of volatile organic compounds in low permeability media , by Gordona, S., Mackay, D., G¨®recki, T., Cherry, J. A. and Pawliszyn, J., 2002

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Analysis of volatile organic compounds using gas chromatography, by Dewulf, J. and van Langenhove, H., 2002

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Application of head-space solid-phase microextraction for the analysis of volatile metabolites emitted by Penicillium species, by Nilssona, T., Larsenb, T. O., Montanarellac, L. and Madsena, J. ?., 1996

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Detection of microbial volatile organic compounds (MVOCs) produced by moulds on various materials, by Fiedler, K., Schutz, E. and Geh, S., 2001

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Determination of ergosterol on mouldy building materials using isotope dilution and gas chromatography--tandem mass spectrometry, by Nielsen, K. F. and Madsenc, J.?., 2000

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Determination of microbial chemical markers by gas chromatography-mass spectrometry - potential for diagnosis and studies on metabolism in situ , by Larsson, L., 1994

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Determination of microbial colonisation in water-damaged buildings using chemical marker analysis by gas chromatography-mass spectrometry, by Szponar, B. and Larsson, L., 2000

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Determination of selected microbial volatile organic compounds by diffusive sampling and dual-column capillary GC-FID--a new feasible approach for the detection of an exposure to indoor mould fungi? , by Elke, K., Begerow, J., Oppermann, H., Kr?mer, U., Jermann, E. and Dunemann, L., 1999

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Determination of unique microbial volatile organic compounds produced by five Aspergillus species commonly found in problem buildings, by Gao, P., Korley, F., Martin, J. and Chen, B., 2002

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Growth of moulds on building materials under different humidities, by Nielsen, K. F., Nielsen, P. and Holm, G., 2000

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On calibration of solid phase microextraction-gas chromatography-mass spectrometry system for analysis of organic air contaminants using gaseous standard mixtures, by Namiesnik, J., Gorlo, D., Wolska, L. and Zygmunt, B., 1999

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Sampling and analysis of microbial volatile organic compounds (MVOCs), by Campbell, J., Casteel, C., Chen, K. and Tuday, M., 2002

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Species-specific production of microbial volatile organic compounds (MVOC) by airborne fungi from a compost facility, by Fischer, G., Schwalbe, R., Moller, M., Ostrowski, R. and Dott, W., 1999

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Survey of building envelope failures in the coastal climate of British Columbia, by Morrison Hershfield Limited, 1998

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The rainscreen wall: a commissioning protocol, by Quirouette, R.L., 1996

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Use of gas chromatography-mass spectrometry/solid phase microextraction for the identification of MVOCs from moldy building materials, by Wady, L., Bunte, A., Pehrson, C. and Larsson, L., 2003

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Volatile metabolites from microorganisms grown on humid building materials and synthetic media, by Claeson, A. S., Levin, J. O., Blomquist, G. and Sunesson, A. L., 2002