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  • Simultaneous quantification of polar and non-polar volatile organic compounds in water samples by direct aqueous injection-gas chromatography/mass spectrometry.

Simultaneous quantification of polar and non-polar volatile organic compounds in water samples by direct aqueous injection-gas chromatography/mass spectrometry.

Journal of chromatography. A (2008-01-19)
Christoph Aeppli, Michael Berg, Thomas B Hofstetter, Rolf Kipfer, René P Schwarzenbach
ABSTRACT

A direct aqueous injection-gas chromatography/mass spectrometry (DAI-GC/MS) method for trace analysis of 24 volatile organic compounds (VOCs) in water samples is presented. The method allows for the simultaneous quantification of benzene, toluene, ethyl benzene, and xylenes (BTEX), methyl tert-butyl ether (MTBE), tert-butyl alcohol (TBA), as well as a variety of chlorinated methanes, ethanes, propane, enthenes and benzenes. Applying a liquid film polyethylene glycol or a porous layer open tubular (PLOT) divinylbenzene GC capillary column to separate the water from the VOCs, volumes of 1-10 microL aqueous sample are directly injected into the GC. No enrichment or pretreatment steps are required and sample volumes as low as 100 microL are sufficient for accurate quantification. Method detection limits determined in natural groundwater samples were between 0.07 and 2.8 microg/L and instrument detection limits of <5 pg were achieved for 21 out of the 24 evaluated VOCs. DAI-GC/MS offers both good accuracy and precision (relative standard deviations <or=10%). The versatility of our method is demonstrated for contaminant quantification in drinking water disinfection (advanced oxidation of MTBE) and for VOC concentration measurements in a polluted aquifer. The wide range of detectable compounds and the lack of labor-intensive sample preparation illustrate that the DAI method is robust and easily applicable for the quantification of important organic groundwater contaminants.

MATERIALS
Product Number
Brand
Product Description

Supelco
Supel-Q PLOT Capillary GC Column, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
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SKUPack SizeAvailabilityPrice
100 μL
1 Estimated to ship on February 20, 2025
¥92,500

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Supelco
Supel-Q PLOT Capillary GC Column, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPrice
100 μL
1 Estimated to ship on February 20, 2025
¥92,500

To order products, please contact your local dealer.