Interlaboratory Comparison of Environmental Analyses Associated with Increased Energy Production
SourceIn order to begin evaluating the state of the art of the determination of pollutants associated with the production of alternate fuels (for example, liquefied coal and shale oil), five collaborative studies have been conducted by the National Bureau of Standards. The aim of these initial studies was to ascertain how well participating laboratories could perform the chromatographic quantitation that is often the final step in a trace organic analytical scheme for priority pollutants. The materials examined in the collaborative studies were polynuclear aromatic hydrocarbons in hexane, phenols in water, phenols in hexane, and N-heterocyclic compounds in hexane. Each of these materials contained between five and eight pure compounds, each compound present at the 1 to 100 μg/ml (ppm) level.