How is the concentration of mtbe measured

Full Record Other Related Research. Abstract In order to assess the pathways for human exposure to methyl-tert-butyl-ether MTBE and to understand the extent of MTBE contamination in watersheds, a purge and trap gas chromatographic mass spectrometric method to measure part-per-trillion ppt concentrations of MTBE in environmental waters was developed. Measurement of methyl-tert-butyl-ether MTBE in raw drinking water.

United States: N. Copy to clipboard. United States. View Conference 1. Other availability. Wilson L. EPA F, 5 pp, Analytical Methodologies for Fuel Oxygenates. EPA F, 2 pp, Holopainen, S. Nousiainen, and M.

Talanta A membrane-extraction module coupled to IMS is a time- and cost-effective analysis method because sampling can be performed in a single procedure and from different natural water matrices within a few minutes.

Consequently, IMS combined with membrane extraction is suitable not only for waterworks and other online applications but also in the field for monitoring the quality of drinking and natural water. LBNL, 28 pp, Contact: William T. Stringfellow, wstringfellow lbl. Davisson, C. Koester, J. Rhodes and A. Environmental Protection Agency, SW Raese, Donna L.

Rose, and Mark W. To help site managers and site consultants estimate mass flux and understand the uncertainty in those estimates, ESTCP has funded the development of a computerized Mass Flux Toolkit, free software that gives site personnel the capability to compare different mass flux approaches, calculate mass flux from transect data, and apply mass flux to manage ground-water plumes.

The toolkit spreadsheet and associated documentation are available on the ESTCP contractor's website in a zipped file. Reeter, J. Fortenberry, E. Lory, M. Contact: Chuck Reeter, reetercv nfesc. A comparison between results from direct-push installed monitoring wells and drilled monitoring wells conducted on the leading edge of a MTBE plume in a shallow semi-perched aquifer.

CSB1, 4 pp, Contact: Dr. Steve Thornton, s. It also provides an overview of characterization and monitoring issues at oxygenate release sites, as well as a detailed review of the tools and techniques used for subsurface assessment.

The expedited site assessment process and the use of modern direct-push tools are particularly emphasized. Geological Survey Scientific Investigations Report , 59 pp, Busch-Harris et al.

Bio-Sep beads can be "baited" with a variety of organic compounds by vapor-phase adsorption onto the PAC component of the beads under reduced pressure. In the aquifer, the bait or the amendment does not substantially leach into the aquifer but is available to the bacteria as a carbon source within the bead. When the organic compound is labeled with C, phospholipids may be extracted from bead biofilms postincubation and derived fatty acid methyl esters analyzed for C Incorporation of C into biomass provides proof of current in situ degradation potential.

Braeckevelt, A. Fischer, and M. Applied Microbiology and Biotechnology 94 6 Hunkeler, R. Meckenstock, B. Sherwood-Lollar, T.

Schmidt, and J. EPA R, 82 pp, When organic contaminants are degraded in the environment, the ratio of stable isotopes often will change, and the extent of degradation can be recognized and predicted from the change in the ratio of stable isotopes. This text provides general recommendations on good practice for sampling, measurement, data evaluation, and interpretation in CSIA.